I have a problem with the I2C version of the Ultrasonic distance measuring unit. If I connect it together with the MLX90640 Thermal Camera Unit the Camera data is corrupted. If I load and run the Demo and only connect the Ultrasonic distance measuring unit every other sample has the distance 4500mm. If I use this code it works fine in the demo but still corrupts the Thermal camera

uint32_t data;
Wire.beginTransmission(0x57); // Transfer data to 0x57.
Wire.write(0x01);
Wire.endTransmission(); // Stop data transmission with the Ultrasonic Unit.
delay(120);
Wire.requestFrom(0x57,3); // Request 3 bytes from Ultrasonic Unit.
data = Wire.read();data <<= 8;
data |= Wire.read();data <<= 8;
data |= Wire.read();

Why doesn't this code work. It used to work fine. Any attempt to set the rate to 9600 hangs no matter where the Serial.begin is placed in the code it runs fine until it hits the Serial.begin();

#include <M5Stack.h>

void setup() {
M5.begin();
Serial.begin(9600);
while (true) {Serial.println("works");}
}
void loop() {
}

The result I get with debug verbose and 115200 baud on the Serial Monitor is
[D][esp32-hal-psram.c:47] psramInit(): PSRAM enabled
09:24:43.911 -> M5Stack initializing...O⸮

Then nothing

You might look at ESPnow to send the values over Wi-Fi. The setup is pretty simple.

I seems that the problem resolved itself. This is very strange. I removed the battery slice several times but this did not resolve the problem. I even removed it once for at least a day. Finally I removed that battery slice and I let the unit sit for several days without the battery. When I reconnected the battery it started working link nothing ever happened.

I tried some additional troubleshooting. I removed the bottom battery slice and plugged the top slice into my computer. There is no connection to the device so nothing can be uploaded. The display is also dark in this configuration and with it plugged into a USB charger.

I plugged the M5Stack into a USB power source and measured the power pins with a DVM. The Battery pin measures 4.2V, the 3.3 volt pin measures 3.3 volts, and the 5V pin 5 volts. But the device does not power up.

It doesn’t appear on the computer. It doesn’t power up with 2 different cables and 2 different USB supplies or when plugged in to the computer USB or on the internal battery.

I was wondering what the Warranty is for the M5sstack. I have purchased may accessories and the the Fire module but the original unit I bought on Amazon from Maker Focus in late January just quit powering up. It is simply bricked. I was working fine a few days ago.

I can't get this example to work. I modified the setup to:

[code]
void setup() {
m5.begin();
preferences.begin("wifi-config");

delay(10);
if (restoreConfig()) {
if (checkConnection()) {
settingMode = false;
startWebServer();
return;
} else {
settingMode = true;
setupMode();
}
}
}
[code]
I tried two SSID's, with and without spaces. There are no non-alpha or special characters in my password.