1) If you don't have a scope, use audacity to see the wave form in the audio file. audacity.png 2) The high frequency file appears to be a codec that has a 48kHz sample rate. Your frequencies > 24kHz will create horrible artifacts called aliasing . VLC.png The low frequency file looks better. The mp...

Cool!
The thingverse pictures helped a bunch. Thanks for sharing!

That could work well if there are only a handful of V1 boards and the CPUs can't be easily swapped and all the V1 mac addresses were recorded or still available. This will typically be the case for me. But keeping a list of more than 5 or so mac addresses in the code starts to be a problem, and if t...

the stackexchange you refer to looks bidirectional. client socket if (client.connect(serverIP, PORT)) { client.print("request\n"); <<<<<<< this is where you put "openvalve" or "closevalve" String response = client.readStringUntil('\n'); Serial.println(response); <<<<<<<< this is where you find out t...

I suspect you are using a bidirectional protocol. Can you show what you do to set up and use the connection? What sort of message do you send to close the relay? What message to open ? How do you receive the message on the far end? If you are building this with http then you could test by using a br...

What sort of supply are you using with the red board? I can't tell if there is a wall-wart connected to the connector at the top right. That supply should be >= 700 ma, preferably a 7 to 9V, >= 1A supply (I read that 12V makes the red board run hot.) The red board is probably like most of them and r...

Are the grounds on the two supplies connected? Without connecting the breadboard and USB grounds, they have no common frame of reference.

Expand the macros. I think this might be the ones: https://github.com/apache/mynewt-nimble/blob/master/nimble/host/include/host/ble_uuid.h #define BLE_UUID16_INIT(uuid16) \ { \ .u = { \ .type = BLE_UUID_TYPE_16, \ }, \ .value = (uuid16), \ } so (ble_uuid16_t) BLE_UUID16_INIT(uuid16) means (ble_uuid1...

https://github.com/nodemcu/nodemcu-firmware/issues/2718 good info at the beginning, not so much at the end. I found I could reload a static spiffs image by (1) delete everything, then (2) re-add the biggest files first, smallest last. My spiffs dir is 80% used. Before that, I tried for each file{de...

115200 * 100 - if that means 11,520,000, which would be about 1MByte per second, that's a really high baud rate. My quick research on RS485 says the flow control is not done with RTS/CTS, but uses software (xon/xoff?). I'd guess there is an occasional buffer overrun, causing dropped characters. I d...