Some sketches an ideas on M5Fire applications
1. M5Fire_PCRAM_fail demonstration.
While porting older ESP32 project to M5Fire I discovered strange device failure which I somewhat tried to isolate
2. M5Fire_PCRAM_fail2 demonstration.
Simplified version with same issue
3. M5Fire_clicker demonstration.
Simplest way of demonstrating unexpected sounds from M5Stack Fire during analogRead
Sometimes same issue is reproducable using Serial.print and Serial.println.
Initing device via M5.begin() reduces sound volume a bit but not eliminates it. (Connecting more external devices to 5V line also reduces sound)