LilyGo-LoRa-Series/firmware/GPS_Reset/README.MD

# GPS Reset firmware

- If the GPS is set to unknown parameters by mistake, causing the GPS to fail to operate normally, you can try to reset the GPS firmware.
- [T-Beam V1.x version record Video](https://youtu.be/Otu5d0fB6HU)
- [T-Beam Supreme GPS record Video](https://youtu.be/yYLgRMr5WDY)



   | name                      | firmware                                |
   | ------------------------- | --------------------------------------- |
   | TBEAM_V1X_NMEA_RESET.bin  | [firmware](./TBEAM_V1X_NMEA_RESET.bin)  |
   | TBEAM_V3.0_NMEA_RESET.bin | [firmware](./TBEAM_V3.0_NMEA_RESET.bin) |


- If the above two firmwares cannot make the GPS work properly, you can try the following two firmwares. Note that the two firmwares **TBEAM_V1X_NMEA_RESET** and **TBEAM_V3.0_NMEA_RESET** are used first to reset the GPS.

   | name                      | firmware                                |
   | ------------------------- | --------------------------------------- |
   | GPS_ reset.bin*           | [firmware](./GPS_%20reset.bin)          |
   | GPS_BasicNMEARead.bin*    | [firmware](./GPS_BasicNMEARead.bin)     |

## How to Flash ?


### Before burning firmware, please put the board into download mode and follow the steps below

 1. Connect the board via the USB cable
 2. Press and hold the **BOOT** button , While still pressing the **BOOT** button (If there is no **BOOT** button, you need to use wires to connect **GND** and **IO0** together.)
 3. Press **RST** button
 4. Release the **RST** button
 5. Release the **BOOT** button (If there is no **BOOT** button, disconnect IO0 from GND.)
 6. Upload sketch
 7. Press the **RST** button to exit download mode



### Use ESP Download Tool

- Download [Flash_download_tool](https://www.espressif.com.cn/sites/default/files/tools/flash_download_tool_3.9.6_0.zip)

![web_flasher](../images/esp_downloader.gif)

* **Note that after writing is completed, you need to press RST to reset**.

### Use Web Flasher

- [ESP Web Flasher Online](https://espressif.github.io/esptool-js/)

![web_flasher](../images/web_flasher.gif)

* **Note that after writing is completed, you need to press RST to reset**.

### Use command line


If system asks about install Developer Tools, do it.

```
python3 -m pip install --upgrade pip
python3 -m pip install esptool
```

In order to launch esptool.py, exec directly with this:

```
python3 -m esptool
```

For ESP32 use the following command to write

```
esptool --chip esp32  --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m 0x0 firmware.bin

```


For ESP32-S3 use the following command to write

```
esptool --chip esp32s3  --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m 0x0 firmware.bin

```

## How to check GPS data ?

1. Download [u-center2](https://www.u-blox.com/en/product/u-center)
2. Check the GPS data according to the guide below
   ![](../images/u-center2.gif)