Hi,
I’m fed up and at my wits end with this but to summarise these are my actions and findings any help or advice that I haven’t already tried would be greatly appreciated.
- Tried 4 different USB to TTL/Serial adapters - all give the same results
- All soldered jumpers/pins confirmed as having continuity and/or correct voltage (3.3V)
- Have tried RX to TX and TX to RX and vice versa, all combinations
- Have tried plugging the USB in and then grounding IO0
- Have tried plugging the USB, grounding IO0 and then touching rst to VCC to reboot the Zigbee chip - no difference
- When attempting to flash with Tasmotizer, the USB TTL Adapter TX led flashes away but nothing received
- The green LED is lit and solid when attempting to flash, no blue lights
Before attempting to flash the ZBBridge, I have used it unflashed and upgraded the firmware to 1.7.0 - could this be blocking flashing attempts?
Please help!