2 KM SUCCESS STORY with HC-12 - going beyond 1800 meters!
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- เผยแพร่เมื่อ 29 ส.ค. 2019
- We achieved a range of over 2 KM with the HC-12.
On one of our other videos, we saw that makers were having problems with achieving decent range with their HC-12 wireless modules with Arduino. We decided to do a field test to see what range / distance could be achieved.
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Buy only HC-12 modules that work, these are tested and they work:
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www.banggood.com/custlink/Kvm... (affiliate link)
In our first HC-12 range test we did NOT get any good results. However, in our second long range test we bit not only get the 1800 meters (1.8 KM) but we passed over 2 KM.
We did use FU4 mode, but we did not use full transmit power.
Link to AT commands video:
• HC-12 AT Commands - Se... - วิทยาศาสตร์และเทคโนโลยี
Thanks for all the good feedback. It warms our heart and gives us the energy to make more. We have spent a lots of time in this video to solve the issues that people had with the HC-12.
Remember to write comments, The first winner of two original HC-12 has been randomly picked, the next winner will be picked after a week and then after a month.
Regards
Thanks for doing this testing guys, the data you have generated is really useful to our community!
That’s great :-)
This is brilliant, thank you guys , very interesting video.
Very cool guys ... thank you !!!
Thanks for going to such great lengths to test these things.
Thanks!
Thanks! I really appreciate this!
Thanks 🤠
Thank you for your efforts to make this wonderful and useful experiment.
Thank you for your nice comment :-)
Thank you thank you thank you.... for this helpful video
Outstanding hard work and great results...
Thanks :-)
Good job, very detailed and clear. Thank you.
Thanks :-)
Gracias por su aportación, saludos desde Mexico.
Super helphull Thanks!
GREAT videos Guys, thanks for your time and effort 👍🏻
Thanks!
Thank You
This was very helpful. Thanks alot
Thanks :-)
Thanks for doing this! Have these modules which look genuine still in the packages and using the nrf2401’s but will give these a try.
I don't really know how I ended up here but, I am glad I did! Love your excitement guys and great work for those results!
Thanks :-)
Hi, great test. Love your new channel. I will use multiple HC12 to build a military grade long range movement sensor connected to app, Text/SMS and or IGR. Much appriciated that u did AT-Commands test and shared the outcomings. If interested i will let u know the distance achieved at max output power.. :)
I love HC12 modules. I am currently getting my wine cellar temperature signal from 12.6km away using two LPD antennas. Lot of forest and buildings between.
Did you get this far using the HC-12 unit?
@@user-ku6ve6zj6e Yes
that was an outstanding test and great results. I can see this working great on larger farms and such with solar power, maybe video recording on SD cards to retrieve remotely for animals and things. great work guys,keep it up please
Thank you 😀
Hi Art! You have been randomly selected at the first winner of two HC-12 modules. If you see our "About" page you will find our contact email address. Send us an email :-)
Nice video, thanks for sharing. I use the HC-12 modules for Mavlink telemetry on my RC/FPV/UAV planes.
Hello , Can I contact you? I have some questions
Thank you for this information! I’m so used to radios working less than what is advertised, but to have it be off by so much made me frustrated. I too had my transceivers fail at about 50 meters. I’m going to order a bunch of these now.
Hi Elmer!
We are exploring a way to fix the bad HC-12 modules. It’s looking good, so there might be hope for the clones as well!
Video coming as soon as we are done with all the testing!
DIY TECH BROS after closely inspecting the ones I purchased on Amazon and eBay just a few weeks ago I’ve discovered that I do indeed have the official HC-12 modules. After setting the mode to FU4 with the AT commands sketch I got slightly more improvement.
I’ve read that you shouldn’t power them over the Arduino USB. I’m assuming that means these need a regulator and to be powered by something other than the Arduino 5v pin. I also put a 1N4007 diode to drop the voltage below 4.5. I also put a 22uF capacitor on the power and ground pins of the HC-12. Still having issues. So my next question is about the antennas. Which antenna did you have the most success with in your experiment?
Thats very good information!
hey there! Rafael from Brazil here, I'm just a young engineer but I hope to find some engineer buddy to make this kind of experiments in the future like you guys, great work!
Hi thank u so much for all the content! I am building a flight computer with a gos for my rocket. I would like to ask you which is the model of the better performing antenna you tested. I am going to look all your videos, they are really helpful! Thank you very much!
Hi @DIY TECH BROS, you are done a great job, thanks for the testing and sharing with us, then i can't see the antenna in your link it's shows err, if you can kindly share the best HC-12 antenna name and buying link.
If you can kindly share the schematic it will help me to understand the use of Capacitors(22uf and 1000uf).
Great video. Is there a chart of this information with the type of antenna used?
finally an informative DIY tech channel in an English accent! Usually, I have to end up listening to Asian accented poorly recorded videos for info like this! (no racism intended)Thanks, I am now a subscriber!
Thank you 😊
Great test, i’m planning to use them on a range of 1-1.2km but i didn’t understand what antenna won the challenge. Could i know the name? Thanks a lot
Try building and using a 8 stages collinear coax antenna at the base station. It's going to blow your mind. Also to raise the range even more, use an SDR as your receiver at the base station and add LNA before input.
Can you please give us some links for example? Thanks in advance.
LOL! You guys are funny! And great results on the transceivers! I am trying to use a US-100 sonar to measure water levels in a cistern outside out house and need to (ideally) transmit the data to our router or a nearby "Raspberry Pi Zero W" or an ESP8266 or ??
I tested the US-100 in our tank and got a pretty solid signal back from the water so I'm pretty sure it will work. The only question of course is the humidity effects on the piezos.
can you tell me which antenna was the best of all the ones you got???
Can you link to the antenna you used?
Can you mention the name of the antennas used. Thanks
hi, you are using capacitors, can i see the schematic of this..
@DIYTECHBRROS can you please tell me what is the antenna name that you use on both sender and receiver toreach 1800meters, because i just reach 500m with the spring antenna and further it not go so please help what is the name of the antenna that use on the both side to reach to 1800meters
Hello guys, Good job! What do you recommend for voice transmission ? i want to make a long range "Bluetooth" for my bike and my friends to talk to its other
Hi, I have been trying to change the channels with AT commands, but the transmission is still working, even when AT+RX says that they are in a different channels.
How can I realy change the channels ? thanks!
Hi I want to achieve 1km RF transmitting for indoor places what should I do?which module can I use for this project?
Banggood sell both the HC-12 module, and an identical GT-38 module, with the GT-38 version costing slightly more than the HC-12.
Does anyone know if units are identical with the same default settings, and whether one is better than the other
Qual antena vc utilizou para alcance de 2km?
Great job guys, Problem though:: In the video you say to use the board with the number 44382A chip but in the link the picture of the board fromm Bang-Good shows in the picture that the supporting chip is a 446318 so did they run out and switch the boards to the crummy one? The board with the 44382A chip is the correct one one?
They are using the wrong image on Banggood. See the images posted recently by customers in the review section. We have also bought these and gotten the original ones :-)
how write coding for push button and potentiometer on hc12
Thanks for the nice video. I want to know whether we can use this module to in inserted in an animal body, so that we can get the readings from outside.?
You can place the hc-12 on a collar. Apart from that we are not able to assist with your questions as we have no qualifications in that field, at all. I would assume, though, that there must me other better and approved options out there.
What types of antennas did you use????
Very helpful video guys! Thank you! So even when you set up the "bad" HC-12 modules right with AT commands, the output power is way less, right? But what about the receiving sensitivity, is that also a problem? Like if I use the "original" module to transmit and one of the "bad" ones to receive. Do you think the range is also decreasing in comparison to only use the "original" ones?
Thanks!
Hi! While we have not tested that we have definitely noticed that it makes a huge difference using an original HC-12 as the sender. As a receiver it seems to not make that much of a difference.
@@DIYTECHBROS wow, you're awesome! Thank you very much for the quick reply. I'm planning to do have some fun and create a project with these modules and I still have a few fake ones laying arround. But I only need one way communication over few hundred meters. Now I know that I can only buy 1 original one as the sender and still use my old ones.
Sounds smart :-) No reason to throw them away when you can put them to use.
Thanks for this video, I didn't know that are HC12 clones modules, I was close to order some but I see it don't worth the money, now I'm buying the originals. I'm a amateur radio operator and here in Chile, we can transmit from 430mhz to 440mhz at full power (up to 25W) so i want to try to use a couple of this modules to transfer data from my home and a remote site in a farm where I have a Linux server with some SDR and HF antennas, currently I access via LTE Network but I want a backup, so im going to use a pair of UHF yagis at about 30 feet from the ground to try to reach about 5km
Hola. ¿Qué tal te resultó el HC-12?, ¿Cuánta distancia lograste?. Soy de Villa Alemana. Saludos.
Next time measure the SWR of the antennas, each antenna is specific for some frequencies.
ples put circuit ho w to give diode connection
hei! kult med filming ved helgelandsmoen, hvor mye tror dere rekkevidden reduseres om modulene blir plassert ~20cm over bakken?
Hei!
Det spørs litt på avstand, mulige hindrer og forstyrrelser i området. Det vil nok i mange tilfeller få greit, men det er ikke det mest optimale. En ekstern antenne kan i sånne tilfeller også hjelpe!
Here you are getting hundreds of meters worth of communication and I can't even get two to communicate together in the same house. lol
Hi! Have you seen this video: th-cam.com/video/ZfBuEAH-Q8Y/w-d-xo.html ? It might fix the problem!
Nice video. Pitty you don't give specs of antenna's and diodes/capacitors used.
Would this work with a drone controller? I have a toy drone that I turned into a fpv drone (first person view) and because of this I want extra range to get further in my house. So I'm interested to see what you guys think
Hello from INDIA,
I am also trying to increase the range using SI4463 transceiver IC. I am using STM32L0 Controller with it but not getting more than 100 meter range.
Can you please suggest some points.
Thanks
Hello, I am trying to communicate whith 2 arduinos via HC12 but there is not responting. Seperately it seems that serial is not available. It runs out of command "if (Serial.available() > 0)". The problem is software or hardware please? Thanks....
How can i use hc-12 with arduino using python language??
Hi guys, I'm currently part of my university model rocket team in charge telemetry and I wanted to know how to buy the hc12 please. I'm worried we'll buy the wrong ones and use up our budget and time trying to get them to work. I'm a beginner in wireless communication but have been involved with micro controllers for a while now. Love your work.
Hi! After doing a bit of research, we can only recommend to buy straight from HC01.com :-)
Would be great to see a link to where you obtained the best performing antennas!
Hi! This was the best antenna rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575571647&toolid=10001&campid=5338657235&customid=antenna+433&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F433MHZ-High-Gain-Antenna-SMA-Within-Needle-Rubber-Glue-Stick-6DBI-MA%2F131535083764 (Affiliate link)
Boa tarde, estou com dificuldade em um código para usar o hc-12 com Arduino uno, para acionar um motor a longa distância. Podem me ajudar com o código?
Cool!=8)
nice =)
Thanks 😀
Hi Guys .Great job. It's possible to transmit variables as humidity or temperature for a wheather station?
Rgds
+Domingos Castelhano Hi! That’s very possible. BUT, if it is battery powered it is best to stick to a power saving mode if possible. And, use a directional antenna, like a helicoil.
Very good work. Did you mention where people can buy the most effective of your tested antennae?
Hi! Excellent question! We bought ours from HC01.com. We are currently looking for a easier place to order from, and will update the description once we can confirm that they are selling original parts.
Just a note to anyone reading - you should really check out Samuel Fielder's TH-cam channel - we love it! th-cam.com/channels/AzYsCl1M56Mq_WzbpU3nXg.html
The antennas are all from ebay. The problem with linking to ebay is that the postings run out.
@@DIYTECHBROS well you can give us some search terms like the length and width and type of metals.
This is the best performing antenna: www.ebay.com/itm/433MHZ-High-Gain-Antenna-SMA-Within-Needle-Rubber-Glue-Stick-6DBI-MA/131535083764
Antennas should be in vertical position👍
Mine transformd mv max 150m in city only why so?
Dette var en bra test gutter! Jeg har testet HC-12 en del selv også, og kjøpt en bunch med antenner også, hehe. Kan dere legge ut linkene til alt dere kjøpte og hvilken antenne dere oppnådde beste resultat med, slik at jeg kan kjøpe tilsvarende?
Thanks! The best performing antenna was www.ebay.com/itm/433MHZ-High-Gain-Antenna-SMA-Within-Needle-Rubber-Glue-Stick-6DBI-MA/131535083764. Note that this in an omnidirectional antenna. If you can use a directional antenna it will further increase your range.
Hey guys I want to transmit GPS coordinates over 1.5-2km range, would it be possible to do this with HC-12? If you could help me with this
Hi!
Just seeing that you are still replying :)
This is an awesome video.
I am using the same sensor and I have one transmitter and 4 receivers. but i have only a few meters range. i want to increase it and the first thing that I will do is increase the power using AT commands. and secondly, I didn't add capacitors to it. can you tell suggested schematics that how you have connected diode and capacitors and also capacitors of what value?
Thanks
Hi!
The recommended capacitor value is anywhere between 22 uF and 1000uF. But for this video we went extreme, with one fast (22 nF) and two bigger, but slower capacitors (belive it was a 22uF + one 1000uF that also covers the Arduino as well.)
BUT, when using an original HC-12 we get ranges far beyond a few meters even without any capacitors just using a powerbank.
So, are you sure you are not using a bad clone?
@@DIYTECHBROS no i am not sure about clone. Should i change that, and can you recommend the procedure?
And also about the transmit power, how much it should be?
Hi!
You do not need much transmit power to reach beyond a few meters. So I would start by making sure you are not using a clone. There is a link in the description to a version that we have tested.
It should reach many hundred meters in its default mode.
So the question is not how much should it be set, but how low can you set it and still receive a signal.
Hope it helps!
Sir please share the HC12 Zip file Link
hi... wanna ask what are the contents of package of original hc-21?
It simply contained the HC-12s and spring antennas :-)
Hello Sirs ,
I testing this module to get the longest range with spring antenna. I have a few questions. I hope that u will answer me.
1. May I know the setting for the longest range ?
2. I tested to send potentiometer datas. The transmitter sent 0-1023 but the receiver receive 0-255. How can I fix it to receive the same value?
Hi Lwin Moe!
1. see this video: th-cam.com/video/0PyHYLAKfnQ/w-d-xo.html
2. sees like you have a 8/10-bit problem with your variables. Try changing it :-)
Why you say your hc12 module can transmit 2k ? the hc12 specifications show only 1k max , please advise?
2K is the range we and others are getting in open range, out of the city, clear weather og well placed antennas.
Placed in a city environment with noice for a stable reception 2K is way “out of range”.
Sir can we use in HC 05 as data transmitter in our joystic
Sure! HC-05 with Bluetooth is great for a Joystick. But I would not recommend the HC-12 (topic of this video) to use in a joystick. Simply because it uses serial communications.
hi guys! i wanna install to my car a bluetooth receiver to pay music from my phone. the question is: is this module what i need? if not, what would you recommend to buy? 'i'm a little bit confused about it; for instance i have seen "Wi-Fi" modules that are paired with the phone via bluetooth and they can work on a big distance like 50 feet or even more. (i do have this module for o project with LED's) is there on the marked thi module for audio too? thanks!
Hi! No, you do not want to use this module for that purpose.
1. The method and transfer rate is not well suited.
2. More importantly, this is not a bluetooth device.
Try, HC-05, HC-06 or even ESP32.
@@DIYTECHBROS thx for your quick reply! so, what i does care is only the working distance, or the range, of the bluetooth module. i was thinking about this one: (www.aliexpress.com/item/32985655660.html?spm=a2g0o.cart.0.0.3b7c3c00KVdFw5&mp=1) since they are saying the distance, about 20meters
The HC-05, HC-06 and ESP32 does not say the distance. i already wrote to the guys. waiting for response.
what do you think will be better only for distance? and can i increase the distance if i solder a bigger antenna?
Do you have a link to the best antenna and where to buy it?
This is the best antenna rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575571647&toolid=10001&campid=5338657235&customid=antenna+433&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F433MHZ-High-Gain-Antenna-SMA-Within-Needle-Rubber-Glue-Stick-6DBI-MA%2F131535083764 (Affiliate link)
@@DIYTECHBROS this link isn't working for me. Do you have an alternative?
No... sorry! There are so many sellers on eBay, so I can’t recommend a untested seller. But, the spring antennas are very, very good. I would only go for an external antenna if a wall or an object was blocking the signal and a different placement of the antenna would improve the signal!
configure HC12 to laptop wifi is it possible? instead of using 2 HC12?? Using laptop as a transmitter the python script will perform some action and the signal will send to the receiver bot(arduino) using hc12??
Only if you use an intermediate device. Obviously HC12 is 433Mhz, and WiFi is either 2.4Ghz or 5Ghz depending on standards. However, an arduino connected to laptop (either via usb or wifi) can retransmit that data to remote arduino via HC12.
Hope that helps.
which one is better hc-12 based on si4463 or si4438?
SI4438 😀
Which model is the best antenna?
This is the best antenna rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575571647&toolid=10001&campid=5338657235&customid=antenna+433&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F433MHZ-High-Gain-Antenna-SMA-Within-Needle-Rubber-Glue-Stick-6DBI-MA%2F131535083764 (Affiliate link)
So the problem was that there was a fake or unreliable hc12 after all 😔
Thanks for the effort keep going
I would like to ask with urgency, whats your experience with this module indoors? How many concrete (about 6"in thick) walls do you think the signal can penetrate? and how much reduction in distance due to these walls? I starting to think that HC12 is more reliable than NRF24l01. Thank you for doing these test and showing the difference between fakes and original chips.
Hi! I prefer using the HC-12 over NRF24L01 in most cases. There are some issues with the HC-12 as well (Serial communication is not the fastest and can delay your loop. And it is slow if you need to transfer a lot of data.)
But, for sensor data it is perfect.
I have not been able to test it though multiple concrete walls. But I have testet it though two wood floors and one concrete - with success :-)
Note that difference in reinforcement will influence the results.
Hope it helps!
@@DIYTECHBROS I apologize for my ignorance because im just starting to dump NRF24 over HC12, but may I ask how much delay there is for example for 10 bytes of data? I want to send 2 analog joystick data plus some. Im planning to use data structure just like in NRF24. Thanks for your reply
@@atdforgebc4605 That will be fast. But, it depends on how how often you will send the data. If it is for an RC car, and you will send data multiple times every second the process of reading from Serial will cause a delay.
@@DIYTECHBROS Thanks for your prompt replies. I you have a great channel, clear and direct to the point which is rare nowadays. I know its hard to produce and present a tutorial content but you do it anyway. Again thank you for doing this and more power to you. Sincerely
atdForge bc Thanks :-)
I can't get my HC12 modules to send over 10 meters. The external antenna doesn't seem to do anything. Best range is with two spring-antennas attached, but still only 10 meters.
Also, my modules won't respond to any AT-command in Serial port.
And they will only work with my WAVGATuno or nano boards not with the normal clones.
Any ideas on this?
(Sorry if I am asking stupid questions, neewb in Arduino tech)
Seems like you unfortunately got some bad clones. Can you read the name of the Transceiver IC? I have never seen any of the 4463x preform any good. We may have found two places where you can buy original modules! Keep you posted as soon as they arrive!
@@DIYTECHBROS Thanks for the quick reply. The name of the transceiver IC is 44382A and it says on the bottom HC01.com Seems like the legit version to me.
Do I understand right that you think the problem is in my arduinos?
You can buy the original HC-12 that work from this link www.banggood.com/custlink/3KGvMGgRvG (affiliate link)
do you have the set pin low, when trying to do the AT commands?
Hello, great video!
Would like to know what external power supply would you recommend to power an Arduino nano connected to hc-12 (would just light up few LED's and a buzzer)
Would also like to know where to get the original hc12, afraid it will loose lot of range if I buy a copy
Hi Pedro! Allow ~20mA for the Arduino, ~100mA for the HC-12, and about ~20 mA for each LED. Add a bit extra for the buzzer and a safety margin. Remember to add some capacitors (both fast and bigger ones) for the HC-12.
Good news, we may have fount two potential places that sell the original ones that are easier to order from than hc01.shop. We are waiting for then to arrive and test them out. I'll let you know as soon as I can confirm!
You can buy the original HC-12 that work from this link www.banggood.com/custlink/3KGvMGgRvG (affiliate link)
Hi ! I am from India. I have used HC12 modules in my project. Unfortunately I got just 3 feet wireless range in my project. Maybe it is because of cheap variants of HC12 modules. I do not recommend anyone to use these modules. Instead of that use Xbee Series 2 modules. You will definitely get 100m-200m wireless range.
Hi Shreyas. Thanks for the information, The Xbee module is crazy expensive $20-25 compared to the Hc-12 that cost around $3-4 atm. Especially if u only getting 100-200m while the Hc-12 gives you 1800m++. The Xbee is a totally different communication module for a different use, mostly seen in mesh networks and so on. Could be fun to test this out though. have just read about it, newer seen one my self.
Awesome! I only reached
Yes, that's what we are doing in this video :)
@@DIYTECHBROS ah, i'm sorry. How to avoid collision of the data received from multiple transmitter ?
Different channels :-)
@@DIYTECHBROS ah, i see. I didn't know a single receiver can receive data from different channels.
Thank you so much, bros!
@@DIYTECHBROS How to adjust the code syntax in receiver to receive different channels? Is it by using while HC12.available()?
Hi I am from India, I brought 2 pairs of HC12 Modules one from bangood and another from Amazon.
The one pair I bought from bangood is working with default factory settings about 200meters(approx). Another pair which I bought from Amazon is working only around 10meters.
But on both the modules when I try to chage the settings using AT command ,I am getting ERROR.
Can you guys please help?
Awaiting for your reply!!!!
Hi! Are you pulling the SET pin low?
@@DIYTECHBROS
Yes,After connecting set pin to gnd, when I send AT Command, it starts sending ATORR ERRROERRRO then it is sending RRRRRRRRRR in serial monitor, If I remove the set pin from gnd it stops sending data to serial monitor.
I don't know what is wrong.
so do different hc-12 modules perform differently? Welp that is annoying.
Can you tell me where to get original HC 12
Johnny petersen Hi! We got ours from HC01.shop
@@DIYTECHBROS How did you manage to buy anything from that shop? :) not much english there :)
You can buy the original HC-12 that work from this link www.banggood.com/custlink/3KGvMGgRvG (affiliate link)
How can I identify my HC-12 as an original or a copy ?
Hi Marc! The current original version of the HC-12 has to small square IC parts (see the video image). I'm not sure about older versions of the HC-12 though.
Also, if the range is a good way to tell!
What I want to know is, would applying those capacitors to the other modules have also improved their range? I see you have other videos on this so maybe it's answered there
The purpose of the capacitors is to make sure there is enough energy (current) available for the transmit signal. Transmitting a signal requires high peaks of current. And if your power source can't deliver the current needed, exactly when needed, the signal will be weaker and lose range.
Buy only HC-12 modules that work, these are tested and they work:
www.banggood.com/custlink/Kvmm1t5uwT (affiliate link)
Sorry guys, I'm still a little bit confused how to spot working modules from modules I shouldn't buy. Would be awesome if you can help me out again with these questions:
1.) As mentioned, they're using different ICs. At 3.50 you can see that 2 ICs are different from each other. Not only the tranceiver IC, also the IC next to the tranceiver IC. You guys said, that the working ones use the si4438 chip while the others use the si4463 chip. So the working ones you bought use the si4438 Chip and the other IC next to the si4438 is also smaller compared with the bad ones? So can I spot bad ones by simply looking at the other IC, if it's the bigger one, it's a bad module, and if it's the smaller one it's a working one? Or isn't it important because they are randomly using different ICs and the important one is only the si4438?
2.) Because of that I'm confused with the ones in your link. The title says "si4438" which is good! But on the picture you can clearely see that the other IC is the big one. But as I said I don't know if all the bad ones use the bigger IC next to the main tranceiver IC. But also if you zoom in and look carefully, there's an si4463 on the picture. Does Banggood only copied the product photos but are shipping the working modules?
I appreciate your help!
Greetings from Germany from a 16 years old, messing arround with arduino :)
@@leandroebner1405 They simply do not know that it is a big difference. The module they ship is the correct one.
@@DIYTECHBROS alright, thank you! Time to order some ;)
@@leandroebner1405 Happy tinkering :-)
@@DIYTECHBROS I bought 2 modules from that link some months ago, and I got modules with a 44631B chip. Is this the one with poor performance? Either way I'm having problems getting more than 5 metres range in FU4 mode.
mythbusters iot :)
+Eugene Zhilkin Hehe, nice :-)
Hi Eugene! You have been selected as the next winner of two HC-12 modules. See our about page where you will find our contact e-mail address. Drop us an email.
Lot of bhakwaas there