The HomeWizard P1 Meter does not support custom firmware

29 Jul 2024

This is just a quick summary of my attempt for people who have the same idea of installing ESPHome or Tasmota on the P1 Dongle. The board has easily accessible debug pins to which a pin header can be soldered, as has been done in the following images, but secure boot and flash encryption is enabled for the ESP-C3-MINI-1 module so it can not be reflashed. The label on my specific board is P1 Dongle EU V1.0 - 2023-10-26. The case is push fit and can be opened by prying it apart at the USB port.

Pictures

Case with board Photo of case with board

Board front view Front view of the board

Board back view Back view of the board

Boot log

021
rst:0x1 (POWERON),boot:0xd (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
Valid secure boot key blocks: 0 1 2
secure boot verification succeeded
load:0x3fcd5988,len:0x2d0c
load:0x403cc710,len:0x770
load:0x403ce710,len:0x595c
entry 0x403cc710
I (335) cpu_start: Unicore app
I (335) cpu_start: Pro cpu up.
I (344) cpu_start: Pro cpu start user code
I (344) cpu_start: cpu freq: 160000000 Hz
I (344) cpu_start: Application information:
I (347) cpu_start: Project name:     p1dongle
I (352) cpu_start: App version:      5.04
I (357) cpu_start: Secure version:   0
I (361) cpu_start: Compile time:      
I (365) cpu_start: ELF file SHA256:  d9c7359fb29904fe...
I (371) cpu_start: ESP-IDF:          v5.1.2
I (376) cpu_start: Min chip rev:     v0.3
I (381) cpu_start: Max chip rev:     v0.99 
I (386) cpu_start: Chip rev:         v0.4
I (391) heap_init: Initializing. RAM available for dynamic allocation:
I (398) heap_init: At 3FC9D6C0 len 00022940 (138 KiB): DRAM
I (404) heap_init: At 3FCC0000 len 0001C710 (113 KiB): DRAM/RETENTION
I (411) heap_init: At 3FCDC710 len 00002950 (10 KiB): DRAM/RETENTION/STACK
I (419) heap_init: At 50000028 len 00001FC0 (7 KiB): RTCRAM
I (426) spi_flash: detected chip: generic
I (430) spi_flash: flash io: dio
I (434) flash_encrypt: Flash encryption mode is RELEASE
I (440) sleep: Configure to isolate all GPIO pins in sleep state
I (446) sleep: Enable automatic switching of GPIO sleep configuration
I (453) app_start: Starting scheduler on CPU0
I (458) main_task: Started on CPU0
I (462) main_task: Calling app_main()
I (473) gpio: GPIO[10]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:3 
I (475) gpio: GPIO[1]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 0| Pulldown: 1| Intr:3 
I (485) gpio: GPIO[19]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 
E (494) FLASH: _flash_read_from_partition(419): failed ESP_ERR_NVS_NOT_FOUND
E (502) FLASH: _flash_read_from_partition(419): failed ESP_ERR_NVS_NOT_FOUND
E (509) FLASH: _flash_read_from_partition(419): failed ESP_ERR_NVS_NOT_FOUND