Hi, I am trying to implement ESP NOW in a way that I only need to enter at my master the MAC address of the peer.
Then I send the master’s MAC to the peer so the peer can register the master’s received MAC.
I succeeded to send the Master’s MAC to the peer but so far I failed to have the peer ...

Some changes in the code:

// Callback when data is received
void OnDataRecv(const uint8_t * mac, const uint8_t *incomingData, int len) {
memcpy(&incomingReadings, incomingData, sizeof(incomingReadings));
Serial.print("Bytes received: ");
Serial.println(len);
incomingTemp = incomingReadings ...

Just an update I just cannot explain...

If I leave the sketch to run for a while it eventually prints a big broadcastAddress, please check at the end.
What am I doing wrong?

21:48:45.243 -> ets Jun 8 2016 00:22:57
21:48:45.243 ->
21:48:45.243 -> rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH ...

"sizeof does not return the length of a string"

OK, I was sure the size of a char array could be found with sizeof, will research, thanks.
But my real problem is why this:
sscanf( mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",&broadcastAddress[0], &broadcastAddress[1], &broadcastAddress[2 ...

Hi, I am trying to implement ESP NOW in a way that I only need to enter at my master the MAC address of the peer.
Then I send the master's MAC to the peer so the peer can register the master's received MAC.
I succeeded to send the Master's MAC to the peer but so far I failed to have the peer ...

ESP32 with RTOS, test app with 2 independent tasks. Each prints a message to OLED display. Why text gets frequently scrambled? Mutex have been used to share display resource.

I found that if I put Task01 to run on the same core as Task02 (core 1) it works perfectly. And if I put both to run on core ...

Hi, I am trying to transfer a small image (5k) to an FTP server (http would also do) but so far no success.

The line: client.connect(ftpServer,21) works and the FTP server returns its welcome text but nothing else works.

I can connect with the same credentials using telnet (using Putty).

In my ...

Hi, thanks all.
What I need is to connect a camera to a TTGO Call where most pins are already taken. relocating some functions may be a solution but I would prefer to have an ESP32-Cam sending captured pictures once every, say, 10 minutes. That would solve the problem.
Regards

Hi, I have run out of GPIO pins on my ESP32 project but still need to capture a picture.
For that I am trying to use an ESP32-Cam.
Cameras need a lot of pins and I just do not have them available.
The ESP-Cam takes the picture and sends to ESP32, I would like to get the image and send it to FTP but ...

Hi, I have a project where I need more GPIO pins than freely available on the ESP32 and would like to have a second ESP32 managing some sensors and, when requested, send sensor reading to the main ESP32 to be uploaded to the internet via GPRS (no Wifi available).
I would like to avoid using local ...