THB1 flashing: Write 0x00002000 bytes to Flash at 0x00003000... error!

[jlmayoral]

With 3 THB1 sensors, 1 flashed fine, but on 2 I get this same error:
Write 0x00002000 bytes to Flash at 0x00003000... error!

It starts fine, but at that point it stops and gives an error.
Does anyone know why this could be? Help! One, it could be a sensor malfunctioning, but two...
This is all the result:

(+ and - connected to battery contacts, not directly to gnd and vcc)
cmd:
$ python3 rdwr_phy62x2.py -p /dev/tty.wchusbserial14610 -b 115200 -e -r wh ./bin/BOOT_THB1_v18.hex

PHY62x2 Utility version 11.03.24

Connecting...
PHY62x2 - Reset Ok
Revision: b'001364c8 6222M005'
FlashID: 1364c8, size: 512 kbytes
PHY62x2 - connected Ok
---- Segments Table -------------------------------------
Segment: 11003000 <- Flash addr: 00003000, Size: 00008f28
Segment: 1fff0000 <- Flash addr: 0000bf28, Size: 00000400
Segment: 1fff1838 <- Flash addr: 0000c328, Size: 00002bd6

Erase Flash work area... ok
Segment Table[03] <- Flash addr: 00002000, Size: 00000130
Write 0x00000130 bytes to Flash at 0x00002000... ok
Segment: 11003000 <- Flash addr: 00003000, Size: 00008f28
Write 0x00002000 bytes to Flash at 0x00003000... error!

It has been damaged, it doesn't even work with the battery... :-(
Thanks!!!

[jlmayoral]

I finally got it!

From my experience the key is to make sure that the wires are well connected to the contacts, without errors.
The sleep 5-10 option gives me some time to bridge between reset and gnd. When the 3 dots appear, I wait 2-3 seconds and remove the bridge. Well-made contacts allow reading or writing the entire flash.
I used v18 first, now I put v19. I have recovered the 3 sensors!

sleep 5 && python3 rdwr_phy62x2.py -p /dev/tty.wchusbserial14610 -b 115200 -e -r wh ./bin/BOOT_THB1_v19.hex

PHY62x2 Utility version 11.03.24

Connecting...
PHY62x2 - Reset Ok
Revision: b'001364c8 6222M005'
FlashID: 1364c8, size: 512 kbytes
PHY62x2 - connected Ok
---- Segments Table -------------------------------------
Segment: 11003000 <- Flash addr: 00003000, Size: 00008f7c
Segment: 1fff0000 <- Flash addr: 0000bf7c, Size: 00000400
Segment: 1fff1838 <- Flash addr: 0000c37c, Size: 00002bd6

Erase Flash work area... ok
Segment Table[03] <- Flash addr: 00002000, Size: 00000130
Write 0x00000130 bytes to Flash at 0x00002000... ok
Segment: 11003000 <- Flash addr: 00003000, Size: 00008f7c
Write 0x00002000 bytes to Flash at 0x00003000... ok
Write 0x00002000 bytes to Flash at 0x00005000... ok
Write 0x00002000 bytes to Flash at 0x00007000... ok
Write 0x00002000 bytes to Flash at 0x00009000... ok
Write 0x00000f7c bytes to Flash at 0x0000b000... ok
Segment: 1fff0000 <- Flash addr: 0000bf7c, Size: 00000400
Write 0x00000400 bytes to Flash at 0x0000bf7c... ok
Segment: 1fff1838 <- Flash addr: 0000c37c, Size: 00002bd6
Write 0x00002000 bytes to Flash at 0x0000c37c... ok
Write 0x00000bd6 bytes to Flash at 0x0000e37c... ok

Write Flash from file: ./bin/BOOT_THB1_v19.hex - ok.
Send command 'reset' - ok