TOMZN 1P 63A Circuit Breaker BL602 ptblu-w No GPIO Response After OpenBL602 Flash

Question 1

Some units ship with a ptblu‑w motherboard using a Bouffalo BL602, not ESP/Tuya. Tasmota targets ESP chips, so you need OpenBL602/OpenBeken builds for BL602. Initial GPIO issues often trace to firmware options or wiring. The thread maps LEDs, button, and relay pins for BL602 and shows the needed drivers. [Elektroda, andreyrose, post #21652116]

Answer

Some units ship with a ptblu‑w motherboard using a Bouffalo BL602, not ESP/Tuya. Tasmota targets ESP chips, so you need OpenBL602/OpenBeken builds for BL602. Initial GPIO issues often trace to firmware options or wiring. The thread maps LEDs, button, and relay pins for BL602 and shows the needed drivers. [Elektroda, andreyrose, post #21652116]

Question 2

Use the latest Bouffalo DevCube and the revised 2 MB partition TOML. Connect BOOT to 3.3 V through 10 kΩ, then flash OpenBL602/OpenBeken. Avoid outdated BL‑DEV versions. After flashing, configure Wi‑Fi and pins. If your image needs Bridge, use a build that includes it. [Elektroda, divadiow, post #21698343]

Answer

Use the latest Bouffalo DevCube and the revised 2 MB partition TOML. Connect BOOT to 3.3 V through 10 kΩ, then flash OpenBL602/OpenBeken. Avoid outdated BL‑DEV versions. After flashing, configure Wi‑Fi and pins. If your image needs Bridge, use a build that includes it. [Elektroda, divadiow, post #21698343]

Question 3

Set XTAL to 40 MHz. Include boot2 in the image. Use the 40 MHz device‑tree file (bl_factory_params_IoTKitA_40M.dts). An expert emphasized, “boot2 is required.” These settings prevent silent boots and missing UART output. [Elektroda, insmod, post #21698942]

Answer

Set XTAL to 40 MHz. Include boot2 in the image. Use the 40 MHz device‑tree file (bl_factory_params_IoTKitA_40M.dts). An expert emphasized, “boot2 is required.” These settings prevent silent boots and missing UART output. [Elektroda, insmod, post #21698942]

Question 4

In DevCube 1.9.0, choose a boot2 from chips/bl602/builtin_imgs/boot2_isp_bl602_v6.6.2. Flash it along with your firmware. This aligns boot flow with the 40 MHz crystal configuration. [Elektroda, insmod, post #21698983]

Answer

In DevCube 1.9.0, choose a boot2 from chips/bl602/builtin_imgs/boot2_isp_bl602_v6.6.2. Flash it along with your firmware. This aligns boot flow with the 40 MHz crystal configuration. [Elektroda, insmod, post #21698983]

Question 5

Reflash with XTAL set to 40 MHz. Add the boot2 image. Select the 40 MHz DTS for factory parameters. After that, the chip should boot and UART output will return. This addresses the no‑output failure caused by incorrect clock configuration. [Elektroda, insmod, post #21698942]

Answer

Reflash with XTAL set to 40 MHz. Add the boot2 image. Select the 40 MHz DTS for factory parameters. After that, the chip should boot and UART output will return. This addresses the no‑output failure caused by incorrect clock configuration. [Elektroda, insmod, post #21698942]

Question 6

One reported cause was swapping phase and neutral during install. After correcting wiring, LEDs and relay pins responded, and the Bridge driver enabled bistable control. Always verify mains wiring before debugging firmware. This edge case mimics dead GPIOs. [Elektroda, andreyrose, post #21652116]

Answer

One reported cause was swapping phase and neutral during install. After correcting wiring, LEDs and relay pins responded, and the Bridge driver enabled bistable control. Always verify mains wiring before debugging firmware. This edge case mimics dead GPIOs. [Elektroda, andreyrose, post #21652116]

Question 7

Assign BridgeREV to pin 20 and BridgeFWD to pin 21. Map WiFiLED_n to pin 2, LED_n to pin 3, and Btn to pin 14. Use a firmware build compiled with the Bridge driver; default images may not include it. Example JSON and commands are provided in‑thread. [Elektroda, andreyrose, post #21652600]

Answer

Assign BridgeREV to pin 20 and BridgeFWD to pin 21. Map WiFiLED_n to pin 2, LED_n to pin 3, and Btn to pin 14. Use a firmware build compiled with the Bridge driver; default images may not include it. Example JSON and commands are provided in‑thread. [Elektroda, andreyrose, post #21652600]

Question 8

Not as of September 24, 2025. A maintainer shared a special build with Bridge enabled while a PR awaited admin review. Use that build if you need bistable relay control today. [Elektroda, insmod, post #21699105]

Answer

Not as of September 24, 2025. A maintainer shared a special build with Bridge enabled while a PR awaited admin review. Use that build if you need bistable relay control today. [Elektroda, insmod, post #21699105]

Question 9

Logs show Wi‑Fi LED on pin 2, Power LED on pin 3, Button on pin 14. Bistable relay uses lr0_on=20 (REV) and lr0_off=21 (FWD). Typical pulse width is 30 ms and interval 250 ms. These values were read from a boot log after restoring backup. [Elektroda, divadiow, post #21652869]

Answer

Logs show Wi‑Fi LED on pin 2, Power LED on pin 3, Button on pin 14. Bistable relay uses lr0_on=20 (REV) and lr0_off=21 (FWD). Typical pulse width is 30 ms and interval 250 ms. These values were read from a boot log after restoring backup. [Elektroda, divadiow, post #21652869]

Question 10

Use the latest Bouffalo DevCube from the official site. A contributor noted there’s no need to stick with 1.4.8 and provided a revised 2 MB partition TOML for flashing. This combination simplifies reliable writes. [Elektroda, divadiow, post #21698343]

Answer

Use the latest Bouffalo DevCube from the official site. A contributor noted there’s no need to stick with 1.4.8 and provided a revised 2 MB partition TOML for flashing. This combination simplifies reliable writes. [Elektroda, divadiow, post #21698343]

Question 11

Yes. Users received a second unit labeled PSF‑B with an ESP8285 module, while 2025‑dated units showed a BL602 motherboard. Expect different firmware paths and pinouts between these variants. Check your board before flashing. [Elektroda, andreyrose, post #21654252]

Answer

Yes. Users received a second unit labeled PSF‑B with an ESP8285 module, while 2025‑dated units showed a BL602 motherboard. Expect different firmware paths and pinouts between these variants. Check your board before flashing. [Elektroda, andreyrose, post #21654252]

Question 12

Yes. A shared factory backup booted successfully and revealed GPIO assignments in the boot log. Backups help verify pins and recover from bad flashes. Keep your original dump safe before experimenting. [Elektroda, divadiow, post #21652869]

Answer

Yes. A shared factory backup booted successfully and revealed GPIO assignments in the boot log. Backups help verify pins and recover from bad flashes. Keep your original dump safe before experimenting. [Elektroda, divadiow, post #21652869]

Question 13

This relay is bistable and expects timed pulses to two coils. The log shows lr_pulse_width=30 ms and lr_interval_width=250 ms. Use the Bridge driver to generate proper forward and reverse pulses instead of holding a single GPIO high. [Elektroda, divadiow, post #21652869]

Answer

This relay is bistable and expects timed pulses to two coils. The log shows lr_pulse_width=30 ms and lr_interval_width=250 ms. Use the Bridge driver to generate proper forward and reverse pulses instead of holding a single GPIO high. [Elektroda, divadiow, post #21652869]

Question 14

Answer

Enter boot mode and open DevCube. 2. Select the revised 2 MB partition TOML and flash your image. 3. Reboot, configure Wi‑Fi, then map pins. This process avoids outdated tools and partition mismatches. [Elektroda, divadiow, post #21698343]

Question 15

Boot logs show UART0 at 2,000,000 baud and UART1 at 4800 baud. If you see gibberish, match these rates in your terminal. High baud on UART0 enables fast logs during boot and flashing. [Elektroda, divadiow, post #21652869]

Answer

Boot logs show UART0 at 2,000,000 baud and UART1 at 4800 baud. If you see gibberish, match these rates in your terminal. High baud on UART0 enables fast logs during boot and flashing. [Elektroda, divadiow, post #21652869]

TOMZN 1P 63A Circuit Breaker BL602 ptblu-w No GPIO Response After OpenBL602 Flash

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