====== GAT562 ======

This is a series of boards made by [[http://www.gat-iot.com/|Shenzhen GAT IoT Technology Co., Ltd.]].

  * [[https://shop.mtoolstec.com/product/gat-nrf52840-sx1262-mesh-module|GAT562 Module]]
  * [[https://www.aliexpress.com/item/1005009830660794.html|GAT562 Mesh Solar Relay (small panel, 800 mAh 14500 battery)]] - :!: the panel is undersized for running Meshtastic except in direct and full sun
  * [[https://www.aliexpress.com/item/1005009844224821.html|GAT562 Mesh Solar Relay (5W panel, 500 mAh 18650(?) battery)]] (similar products using other LoRa modules: [[https://www.keepteen.com/all-products.html|Keepteen D5]])
  * [[https://shop.mtoolstec.com/product/gat562-mesh-tracker|GAT562 Mesh Tracker]]
  * [[https://www.aliexpress.com/item/1005009812428258.html|GAT562 Mesh Tracker Pro]]
  * [[https://shop.mtoolstec.com/product/gat562-solar-evb|GAT562 Solar EVB]]
  * [[https://shop.mtoolstec.com/product/gat562-30s-kit-30dbm-mesh-device|GAT562 30s - 30dBm Mesh Device]]
  * [[https://shop.mtoolstec.com/product/meshtiny|Meshtiny]]

===== Pinouts =====

==== GAT562 Solar EVB ====

  * USB - //closest to LEDs//
    - +5V (RD) (square pad)
    - USBD- (WH)
    - USBD+ (GN)
    - GND (BK)
  * SWD/J-Link - //closest to BT ANT//
    - GND (square pad)
    - SWCLK
    - SWDIO
    - +3V3
  * RST pad - short to GND (e.g. metal shield on module to reset
    * Reset twice within 500 ms to enter DFU mode (USB disk UF2 upload and CDC serial upload with nrfutil)
  * S-, S+ - ≤6 V solar panel
  * B-, B+ - 4.2V lithium cell (or multiple cells in parallel)
===== Meshtastic Firmware =====

RAK4631 firmware natively works on GAT562-based boards. Pinout and peripherals are mostly identical.

There is currently no official Meshtastic support for GAT562 products, however there are DIY variants (i.e. you have to compile them yourself) upstream for:

  * [[https://github.com/meshtastic/firmware/tree/master/variants/nrf52840/gat562_mesh_trial_tracker|gat562_mesh_trial_tracker]]
  * [[https://github.com/meshtastic/firmware/tree/master/variants/nrf52840/meshtiny|meshtiny]]

==== Vendor Firmware Binaries ====

^ File ^ Applicable Product(s) ^ Flashing Method ^ Date ^ Version Number ^ Commit ^ Notes ^
^ {{:projects:amateur_radio:meshtastic:components:gat562_mesh_solar_relay_2.7.16_1124.uf2}} | GAT562 Mesh Solar Relay | USB (Disk) | ❓ | 2.7.16 | ❓ | Untested |


===== Bootloaders =====

^ File  ^ Applicable Product(s) ^ Flashing Method ^ Date ^ Version Number ^ Commit ^ SoftDevice ^ Model ^ BLE OTA ^ Notes ^
^ (None) | GAT562 Module\\ GAT562 Mesh Solar Relay\\ GAT562 Solar EVB | N/A | ''Jun 10 2025'' | 0.4.3 | ❓ | S140 SoftDevice v6.1.1 | WisBlock RAK4631 Board | ❌  |   |
^ {{:projects:amateur_radio:meshtastic:components:gat562_bootloader-geb397aa_s140_6.1.1_0713.hex}}  | GAT562 Module\\ GAT562 Mesh Solar Relay\\ GAT562 Solar EVB | SWD (J-Link)  | ''Nov  8 2025'' | 0.4.5 | ❓  | S140 SoftDevice v6.1.1 | GAT562 BOARD | ❓  | **Untested** |
^ {{:projects:amateur_radio:meshtastic:components:update-gat562_board_bootloader-0.4.5_nosd.uf2}}  | GAT562 Module\\ GAT562 Mesh Solar Relay\\ GAT562 Solar EVB | USB (Disk)  | ''Nov  8 2025'' | 0.4.5  | ❓  | None  | GAT562 BOARD | ✅ Fast | Tested on GAT562 Solar EVB  |