Flashing custom firmware like tasmota or esphome and then restoring back to original

Hardware
42

Folks,

I am following this thread closely. Can anyone help to share steps for hardware preperation to install tasmota?

I am aware of general process of flashing and subsequent webui setup but thanks to my poor soldering skills, I am confused on steps to make tinxy device recognizable in flash program.

Thank you.

43

ON 1N Device you need to hold the push button while powering up the device to put it into flash mode.

44

Sorry for not making me clear!!. 1N device has been fairly easy to tasmotize.

I would be more interested in understading 2N 4N 6N hardware preperation steps because they involve more complex processes.

45

Hi buddy any luck of 4 ch fan module?

46

I do have an idea for a way to do it but I am yet to try the idea out in practice. It would take me a few months before I actually and sit down to work on this though.

47

Hi

Can someone guide in preparing a 2N & 4N device for flashing custom firmware?
I have followed the steps mentioned in the post above including breaking the RX/TX connection to MCU but still not able to get the device into flash mode.

Thanks in advance.

48

In order to put the ESP into flash mode, press and hold the reset button before/while connecting VCC

49

Thanks @Fiery

Was able to flash ESPHome on a 2N device & it works great with HA

Will try out a 4N device.

50

@amitxin I am stuck at trying to connect Tinxy 6N to FTDI controller to flash Tasmota on it. I have connected GND → GND, RX → TX, TX → RX & VCC → VCC (3,3v) in FTDI to Tinxy.

After connecting, holding the reset button on Tinxy and plugging the FTDI to computer and trying to flash Tasmota, Tasmotizer is still stuck at “connecting”?

Question:

  1. How put Tinxy 6N (and also 4N and 1N) to debug mode? Is holding given reset button on Tinxy enough when plugging in FTDI controller?

  2. From the above discussion, there is a point about connecting D3 to GPIO0? Is this required?

    • If so, there are 2 D3 marking on the Tinxy 6N. One on the small sister board, Another D3 on the back of the main board.
    • Also, D3 has +ve and -ve. To which terminal of D3 should I connect with GPIO0? (I assume -ve).
    • And should this connection be connected for the duration of the flashing or only to enter debug mode.

  3. There is also another point about desoldering RX/TX pin between 2 boards for flashing and reconnecting after flashing? Is this also required? If so, can someone provide more details about what to desolder?

I have bought couple of Tinxy devices and would like to connect to HomeAssistant. Would really appreciate the help.

51

I use CH340 based programmer (used to flash ESP-01), So I connect GND → GND, Tx → Tx, Rx → Rx & Vcc → Vcc (3.3). Uses Arduino serial monitor check the logs (without connecting to main power supply).
To upload the custom firmware, connects the GPIO0 to GND (via 10K), then connects the Vcc and you can see the ESP is in flash mode on serial monitor window, close the serial monitor window and upload the firmware. Mostly, the connection between GPIO0 and GND is required only to access flash mode, once it is flash mode you can disconnect it continue with flashing.
Point 3: yes you need to disconnect the serial communication between ESP and other MCU. After flashing, you have to connect it back.

52

I am trying to flash 16A 1N with Tasmota/ESPHome, but the module keeps on restarting every 30-40 seconds. Works fine when connected to serial via RX,TX,G,VCC. I really need to use custom firmware for my home automation. Please help

53

There is nothing wrong with the device as per your description. Just create a continous PWM singal on GPIO14 on intitial boot.

This will fix the esp restart

1 Like
54

Thank you for your reply. Please let me know the physical switch GPIO, am using GPIO4, but currently, the switch is keepon on/off.

55

hi @mohit

Please be more specific on this. What is the frequency needed for the pwm signal? Assuming it has to be done right after hardware initialization till wifi setup.

56

Any frequency and 50% duty cycle should work

57

Guys, Just posting my fix here for the esp restart. For esphome users, this should fix the reboot issue. The key is, it should be at priority 200. on_boot documentation for reference

esphome:
  name: devicename
  on_boot:
    - priority: 200.0
      then:
        - output.turn_on: gen_pwm_test
        - output.set_level:
            id: gen_pwm_test
            level: 50%

output:
  - platform: esp8266_pwm
    id: gen_pwm_test  
    pin: GPIO14
    frequency: 1000 Hz

thanks to @mohit !