I am having a really bizarre issue with an MG996R servo, controlled by an ESP32-D2WD.

Completely intermittently (once or twice a day, running all day), and without making a call to any Servo class methods, it will jump around. AFAIK know, the power is stable. But, I am wondering if perhaps some ...

I've been having an intermittent problem lately, where 1 in 4 downloads to my custom-built ESP32 boards won't launch, despite perfectly valid compiling code.

I get the following message on the serial monitor "VMDPV_1|1_".. and nothing else executes. The strange thing is, that this happens ...

Yes, thanks for your help. I re-posted this on another topic, when I realized this might not be a hardware issue. I think this solves it.

Problem was unique to the D2WD in that it has more reserved flash pins than the D0WD. I incorrectly assumed that the additional flash pins needed for the D2WD ...

pin 10 is not available on either board. Please consult a pinmap https://github.com/espressif/arduino-es ... ard-pinmap

Even for the D2WD chip? According to https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf, page 10, the embedded flash uses different pins on the ...

I originally posted this under the Hardware topic, but, I think this may not be a power issue at this point.

I am wondering if there is some sort of conflict possible with ledcWrite and the use of the serial ports?

In the code below, it seems that if I comment out ledcWrite from the setup, Serial ...

Update.

I am now wondering if there is some sort of conflict possible with ledcWrite and the use of the serial port.

It seems that if I comment out ledcWrite from the setup, Serial.println("beep") works fine indefinitely.


void setup()
{
Serial.begin(9600);
Serial.println("setup begin ...

that's the only code running on the entire board? print shouldn't draw hardly any current or cause any appreciable voltage loss from what I know?

In the loop, yes.

The setup has some initialization routines, and where the baud rate is set, of course.

If I make a call to serial.println in the ...

I have a custom designed PCB that intermittently reboots with the following message:


Guru Meditation Error: Core 0 panic'ed (IllegalInstruction). Exception was unhandled.
Core 0 register dump:
PC : 0x400d5f70 PS : 0x00060730 A0 : 0x00000000 A1 : 0x3ffc4e50
A2 : 0x00000000 A3 : 0x00000000 A4 ...

Just an update..

I finally got the thing working. Turns out my Arduino project settings were incorrect. It MUST be set to Partion Scheme: Minimal (2MB FLASH) when uploading to the D2WD.

I noticed this when it detected 2MB when doing previous upload attempts. For some reason I thought this chip was ...

I recently had a PCB printed, and was having some difficulty communicating to if via the built in CP2102N chip I added to it.

However, I put a few extra jumpers on the board, and managed to upload the code using a separate CP2102 board.

https://www.robotshop.com/ca/en/cp2102micro-usb-to-uart ...