As per my previous post above, I reached out to Lucky Miner to request a copy of the LV07 firmware but they just replied that I should buy another one, so I did.
I found a cheap new LV07 on AliExpress, which arrived 6 days later.
Connected the CP2104 UART to USB adapter & successfully downloaded the firmware.
Then uploaded to the older LV07, which at first seemed to spring into life. The display showed the expected screen, but I couldn't connect to it over its internal WiFi.
I'm still seeing various errors in the serial log, so am guessing I must've damaged something during my firmware update efforts...
E (2965) i2c.master: I2C transaction unexpected nack detected
E (2965) i2c.master: s_i2c_synchronous_transaction(872): I2C transaction failed
E (2965) i2c.master: i2c_master_transmit_receive(1097): I2C transaction failed
E (2975) TPS546.c: Could not read Vout
E (2975) i2c.master: I2C transaction unexpected nack detected
E (2985) i2c.master: s_i2c_synchronous_transaction(872): I2C transaction failed
E (2995) i2c.master: i2c_master_transmit_receive(1097): I2C transaction failed
E (2995) TPS546.c: Could not read Iout
I (3005) power_management: 24 vout: 0.00, iout: 0.00
E (3005) i2c.master: I2C transaction unexpected nack detected
E (3015) i2c.master: s_i2c_synchronous_transaction(872): I2C transaction failed
E (3025) i2c.master: i2c_master_transmit_receive(1097): I2C transaction failed
E (3035) TPS546.c: Could not read VIN
I (3035) EMC2302: GET-Fan Speed[0] 431 = 4561 RPM, MSB 0x0D
I (3045) power_management: Board Temp: 27, 26
E (3045) i2c.master: I2C transaction unexpected nack detected
E (3055) i2c.master: s_i2c_synchronous_transaction(872): I2C transaction failed
E (3065) i2c.master: i2c_master_transmit_receive(1097): I2C transaction failed
E (3065) i2c.master: I2C transaction unexpected nack detected
E (3075) i2c.master: s_i2c_synchronous_transaction(872): I2C transaction failed
E (3085) i2c.master: i2c_master_transmit_receive(1097): I2C transaction failed
I (3065) power_management: TMP546_1 Temp: 0
E (3095) FreeRTOS: FreeRTOS Task "power mangement" should not return, Aborting now!
I'm therefore kinda wary of giving it another go on my new LV07, as I don't want to repeat the same mistakes.
Having read through this larger thread it seems some folk have had success, so I'm wondering if there's any pointers/tips you might be able to give?
Cheers!