1 week ago
Satyam Raj
(verified owner)
Sorry for the bad review earlier. forgot to login. Its working now. Thanks:)
2 weeks ago
Scott J
this module is very sensitive to DC power noise. using an AC offline DC switching module to convert 120VAC to 5V with ESP8266 module, this module will constantly false trigger. I helps to use pi filter with 10mH and two 470uF, then filter false triggers in software. They are handy, but beware of glitches.
2 weeks ago
Chao
Hi, It is working, please login first, you can find the login credential in your order tracking info email.
2 weeks ago
Satyam Raj
(verified owner)
The documentation page is not working
3 months ago
bjornhallberg
(verified owner)
Good range compared to other modules. Does require good quality power supply to reach its advertised 40cm though (the video in the description was run on 3xAA/AAA type batteries!) but even on a "normal" supply you will get ~20cm. I don't know the exact range I get out of the cheap rdm6300 modules under comparable circumstances with the same card but it might be as short as ~2cm. So thumbs up for this module. Was also able to run it on 3.3V ... range seems to be the same as on 5V (at least with a crap power supply).
3 months ago
Chao
Hi Jaggit, From our test, either 3.3V or 5V the module can work, but the on board ACDC supply 5V out.
3 months ago
jaggil
(verified owner)
Please, those people who report that the module works correctly, can you inform us of the voltage Vcc that pins 1 and 5 have? (HLW8032 supply voltage) Thank you
4 months ago
Loris
(verified owner)
Compact board, useful. I shopped twice. But: - resistor leg close to the connector of 220V should be isolated. - bigger connection on the board for the relays and bigger screw for the cables. - ADC shorted to another contact under the ESP8266. Thanks Tema for enlighen me. I realize it now that I have start using the pin that there was something wrong with it, but I had frequent reboot and ununderstandable low power wifi. - I wonder if I can them (at least 10) replaced with perfect one.
4 months ago
JH
arrived on time, also the second smallest form factor i could find on the market! pity very hard to find a suitably sized edge connector.
4 months ago
gkalemis
(verified owner)
Good solid product. You have to read the wiki page for the connections and use github code in the beginning. Support from the store is excellent. I achieved around 30cm with the included fat card. Buzzer is not included.
4 months ago
Bertrand
(verified owner)
Nice cheap module. You have to know that this module must be positive center powered and there is no reverse polarity protection.
5 months ago
Manolis N
schematics on wiki are not public, please share
5 months ago
Chao
Dear customer, We just checked our stock, all have bootloader. 1.Please double check the wiring. see image here: https://twitter.com/electro_phoenix/status/1138290433480519680 2. Make sure you choose correct board, it should be pro mini 5V/16M. The programming guide is product description, please double check.
6 months ago
rmerlob
(verified owner)
I bought a couple of these GPRS relay boards that I have not been able to make them work. They DO NOT get connected to the arduino IDE. Apparently they came with out bootloader.