Post #2664098
2026-04-24 21:48 UTC
@neptune22222@kolektiva.social it's probably not the clock.
First I'd make sure my user has permissions to /dev/ttyA whatever, though you probably know to check that.
Then I'd check the power supply voltage at the chip, and that the reset pin does go high properly.
Then I'd scope the digital lines from the converter chip to make sure they look reasonable, maybe the converter chip is not on.
Using a scope on the crystal is unreliable, the capacitance of the tip is often enough to make them stop oscillating.
Replies (1)
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@neptune22222@kolektiva.social 2026-04-24 22:36
@bipolaron@scholar.social Ooh, I had forgotten to pull pin 8 up, and now it looks like it connects and recognizes the chip correctly, but it fails to upload with the following error: ---- esptool v5.3.dev2 Serial port /dev/ttyUSB1: Connecting... Connected to ESP32-C3 on /dev/ttyUSB1: Chip type: ESP32-C3 (QFN32) (revision v1.1) Features: Wi-Fi, BT 5 (LE), Single Core, 160MHz, Embedded Flash 4MB (XMC) Crystal frequency: 40MHz MAC: 7c:2c:67:0c:44:c0 Uploading stub flasher... A fatal error occurred: Invalid head of packet (0x45): Possible serial noise or corruption. ---- I'll keep poking at it...