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Note: OLED is not soldered to T-BEAMThe UK Warehouse does not includes the OLED, please note before buying, if necessary, you can buy separately Product ID:958196/Product;ID:969144 Product Upgrade Content: 1. Pin GPIO34 pin is replaced with GPIO35 2. Replace the charging IC (TP5400) with the power management AXP192 3. GPS TX, RX pin replacement 4. Power on and remove, replace with button to open 5. Reduced sleep current 6. GPS battery replacement OLED 1. Size: 0.96 inch 2. High resolution: 128 * 64 3. Color: white 4. Viewing angle: ; 160 ° 5. Driver IC: SSD1306 6. Working temperature: -30 ;celcius ~ 80 ;celcius 7. Module volume (generous): 27.0MM * 27.0MM * 4.1MM 8. Supports many control chip: Fully compatible with , 51 series, MSP430 series,STM32/2, etc. (a lot of routines for reference) 9. Wide voltage support: without any modification, directly supports 3.3V ~ 5V DC 10. Ultra-low power consumption: Normal operation Is 0.04W 11. IO port occupies minimal display: The IIC communication, as long as the two IO ports ESP32 Features: Lastest ESP32 Version: REV1 WIFI bluetooth; 4MB PSRAM 4MB Flash 3D Antenna LORA Features: Working voltage: 1.8~3.7v Acceptable current: 10~14mA Transmit current: 120mA@+20dBm, ;90mA@+17dBm, 29mA@+13dBm Operating frequency: 433/470MHz(433HMz version) /868M/915M(868MHz version) Transmit power: +20dBm Receive sensitivity: -139dBm@LoRa ;62.5Khz;SF=12;146bps -136dBm@LoRa ;125Khz;SF=12;293bps -118dBm@LoRa ;125Khz;SF=6;9380bps -123dBm@FSK;5Khz;1.2Kbps