TTGO T-Beam

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Notes

It appears that a uBlox NEO-M8Q can be dropped in place of the NEO-6 GPS module

Pin Map

U14 is on the PCB edge with the SMA connector, with pin 1 closest to the WiFi/BLE antenna

U12 is on the PCB edge with the USB connector, with pin 1 closest to the LoRa module

TTGO T-Beam Pin Map
GPIO # ESP32 Pin # U12 Pin # U14 Pin # ESP32 Module Pin Name Notes
GPIO_0 23 5 GPIO0 (goes off page)
GPIO_1 41 1 UART0 U0TXD TXD to CP2104
GPIO_2 22 3 GPIO2
GPIO_3 40 2 UART0 U0RXD RXD from CP2104
GPIO_4 24 4 GPIO4
GPIO_5 34 GPIO5 LORA CLK
GPIO_6 31 SD SD_CLK To FLASH clock
GPIO_7 32 SD SD_DATA_0 To FLASH, PSRAM data 0
GPIO_8 33 SD SD_DATA_1 To FLASH, PSRAM data 1
GPIO_9 28 SD SD_DATA_2 To FLASH, PSRAM data 2
GPIO_10 29 SD SD_DATA_3 To FLASH, PSRAM data 3
GPIO_11 30 SD SD_CMD To FLASH chip select (active low)
GPIO_12 18 UART1 MTDI RXD from GPS
GPIO_13 20 4 GPIO13
GPIO_14 17 5 GPIO14 Blue LED (0=off, 1=on)
GPIO_15 21 UART1 MTDO TXD to GPS
GPIO_16 25 GPIO16 To PSRAM chip select (active low)
GPIO_17 27 GPIO17 To PSRAM clock
GPIO_18 35 GPIO18 To LoRa chip select (active low)
GPIO_19 38 GPIO19 To LoRa MISO
GPIO_20 GPIO_20 does not exist
GPIO_21 42 10 GPIO21 I2C SDA
GPIO_22 39 9 GPIO22 I2C SCL
GPIO_23 36 3 GPIO23 To LoRa reset (active low)
GPIO_24 GPIO_24 does not exist
GPIO_25 14 6 GPIO25
GPIO_26 15 GPIO26 To LoRa DIO0 (interrupt)
GPIO_27 16 GPIO27 To LoRa MOSI
GPIO_28 GPIO_28 does not exist
GPIO_29 GPIO_29 does not exist
GPIO_30 GPIO_30 does not exist
GPIO_31 GPIO_31 does not exist
GPIO_32 12 8 32K_XP To LoRa DIO2 (interrupt)
GPIO_33 13 32K_XN To LoRa DIO1 (interrupt)
GPIO_34 10 10 VDET_1
GPIO_35 11 VDET_2
GPIO_36 5 13 Touch SENSOR_VP
GPIO_37 6 Touch SENSOR_CAPP
GPIO_38 7 Touch SENSOR_CAPN
GPIO_39 8 12 Touch SENSOR_VN SW5

Specifications

ESP32
  ESP32 Version REV1
  WiFi
  Bluetooth 
  4MB Flash
  3D Antenna
 
LORA
  Working voltage:      1.8 ~ 3.7v
  Acceptable current:   10 ~ 14mA
  Transmit current:     120mA @ +20dBm
                         90mA @ +17dBm
                         29mA @ +13dBm
  Operating frequency:  433MHz / 868MHz / 915MHz
  Transmit power:       +20dBm
  Receive sensitivity:  -139dBm @ LoRa &  62.5 KHz & SF=12 &  146bps
                        -136dBm @ LoRa & 125 KHz   & SF=12 &  293bps
                        -118dBm @ LoRa & 125 KHz   & SF=6  & 9380bps
                        -123dBm @ FSK  &   5 KHz   & 1.2Kbps
  Frequency error:       +/-15KHz
  FIFO space:            64 byte
  Data rate:             1.2K ~ 300Kbps @ FSK
                         0.018K ~ 37.5Kbps @ LoRa        
  Modulation Mode:       FSK, GFSK, MSK, GMSK, LoRa TM, OOK
  Interface form:        SPI
  Sleep current:         0.2uA @ SLEEP
                         1.5uA @ IDLE
  Operating temperature: -40℃ - +85℃
  Digital RSSI function
  Automatic frequency correction
  Automatic gain control 
  RF wake-up function
  Low voltage detection and temperature sensor
  Fast wake-up and frequency hopping
  Highly configurable data packet handler

GPS
  GPS modules NEO-6M, 3V-5V power supply Universal
  Destined module with ceramic antenna, signal super
  Save the configuration parameter data EEPROM Down
  With data backup battery
  There are LED signal indicator
  Default Baud Rate: 9600

Power
  IP5306 2A Battery PMIC
  LED, Blue - User controller
  LED, Red - GPS 1PPS
  LED, Red/green - battery charged/power on
  Button, reset switch
  Button, user readable
  Switch, power on/battery charge
  USB
  CP2104-GMR

Resources

Files