GAT562 Solar EVB is based on customized PCB and GAT562 Module. Key Features Built-in LoRa and Bluetooth IPEX connector Smart power manage depending on the voltage of battery 3.6V(Around 70%) Auto power off when battery level is less than 3.0V. GTA562 Lora Node Module is a module based on the nRF52840 and SX1262, supporting both Bluetooth and LoRa communication modes. GAT562 PIN Definition NO Name Type Description 1 VBUS Input DC 5V power supply 2 USB_D- Input/Output USB data interface 3 USB_D Input/Output USB data interface 4 GND — Ground 5 VBAT_NRF Input/Output Battery power supply 6 I2C_SDA Input/Output I2C (SDA) P0.13 7 I2C_SCL Input/Output I2C (SCL) P0.14 8 GND — Ground 9 UART2_RX Input UART2 interface P0.15 10 UART2_TX Output UART2 interface P0.16 11 UART2_DE Input/Output UART DE interface P0.17 12 NRF_RST Input Reset pin 13 VDD_NRF Input/Output DC 3V3 power supply (output when powered by 5V/VBAT) 14 GND — Ground 15 UART1_TX Output UART1 interface P0.19 16 UART1_RX Input UART1 interface P0.20 17 UART1_DE Input/Output UART2 interface P0.21 18 SWDIO Input/Output SWD debug pin (SWDIO) 19 SWCLK Input/Output SWD debug pin (SWCLK) 20 GND — Ground 21 VBAT_SX Input DC 3V3 power supply 22 I2C_SDA2 Input/Output I2C (SDA) P0.24 23 I2C_SCL2 Input/Output I2C (SCL) P0.25 24 SW1 Output GPIO P1.01 25 SW2 Output GPIO P1.02 26 LED1 Output GPIO P1.03 27 LED2 Output GPIO P1.04 28 NFC1 Output NFC/GPIO P0.09 29 NFC2 Output NFC/GPIO P0.10 30 QSPI_CLK Input/Output SPI interface/GPIO P0.03 31 QSPI_DIO3 Input/Output SPI interface/GPIO P0.02 32 QSPI_DIO1 Input/Output SPI interface/GPIO P0.29 33 P0.31/AIN7 Input ADC interface/GPIO P0.31 34 QSPI_DIO0 Input/Output SPI interface/GPIO P0.30 35 QSPI_DIO2 Input/Output SPI interface/GPIO P0.28 36 P0.05/AIN3 Input ADC interface/GPIO P0.05 37 P0.04/AIN2 Input ADC interface/GPIO P0.04 38 QSPI_CS Input/Output SPI interface/GPIO P0.26 39 GND — Ground 40 LoRa RF Output RF port (for models without IPEX connector) Radio Specification Characteristic Status MIN TYP MAX UNIT RF Transmission RF Transmission – 14 20 dBm Receiver Sensitivity RSSI -130 – – dBm SNR -15 – – dB Power Consumption TX mode 130 (14dBm) – – mA RX mode 7.2 – – mA Sleep mode 7.2 – – μA How to upgrade firmware GAT562 Solar Relay comes with advanced bootloader. You can upgrade Meshtastic or MeshCore Repeater in MTools BLE within 2mins. For the moment on MeshCore Repeater, use Rak4631 for competible. OTA process does not wipe the data on device. Application Example FAQ Q: How to config MeshCore Repeater on GAT562 Solar Relay at first time. A: You need to flash the device to MeshCore Repeater then connect it to PC and wiring V, D , D-, GND to a USB cable. Then config it on https://flasher.meshcore.co.uk/. Q: How to upgrade firmware on GAT562 Solar Relay? A: Use MTools BLE App recommanded or use Drag and Drop with uf2 firmware. Q: What’s the input voltage of S and S-? A: It’s 4.5V to 5.5V. Q: Does GAT562 Solar Relay as MPPT? A: Nope, but it has the power management chip to improve low voltage power-on control at 3.3V.
