Introduction T3S3 is a new version of the LoRa series formerly LoRa32 series which carries the SX1280 LoRa module supports the LoRa 2 4G frequency band which supports global use and is also equipped with the ESP32 main control chip which supports TF cards Github More information It is recommended to control the output power of the SX1280 chip between 2 5 dBm when using the SX1280 PA module to ensure that the entire module outputs a power of 20 dBm If the output power of the SX1280 chip is higher than 5 dBm it will exceed the maximum allowable input for the FEM chip and cause damage However if the output power is lower than 2 dBm the module s output power will still be within 20 dBm Therefore the output power setting of the SX1280 chip must be carefully controlled and not exceed 2 5 dBm to avoid damaging the FEM chip Setting the output power to 3 dBm will ensure an output power of 20 dBm Specification MCU ESP32S3 Flash 4MB PSRAM 2MBCommunication protocol Wi Fi Bluetooth 5 0 BLE Bluetooth Low EnergyOnboard functions reset BOOT button support TF card built in external antenna switchablePower supply mode support USB power supply 3 7V lithium battery power supply battery power switchScreen 0 96 inches SSD1306 Driver I2C OLEDResolution 128x64 I2C Interface SDA IO18 SCL IO17Model comparisonSX1280SX1276SX1262Support frequency2 4 Ghz868 915Mhz868 915MhzHigh efficiency PA 12dBm 14dBm 22dBm l 5dBmLow power RX9 9mA9 9mA4 6mAPackage includes 1 X T3S3 2 X