Pinout
These are list of pins connected on your IOT-A-SYNC board.
For ESP-32 datasheet visit : https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf
For ESP32-Wroom datasheet visit : https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_en.pdf
| GPIO | INPUT | OUTPUT | NOTES | Peripheral pins | Available on header |
|---|---|---|---|---|---|
| 0 | pulled up | OK | outputs PWM signal at boot | YES | |
| 1 | TX pin | OK | debut output at boot | YES | |
| 2 | OK | RX pin | connected to on-board LED (in some wroom) | LED/EC_17 | YES |
| 3 | OK | OK | HIGH at boot | YES | |
| 4 | OK | OK | SWITCH/EC_18 | YES | |
| 5 | X | X | outputs PWM signal at boot | LoRa_NSS(SS/CS) | YES |
| 6 | X | X | connected to the integrated SPI flash | NOT REQUIRED | |
| 7 | X | X | connected to the integrated SPI flash | NOT REQUIRED | |
| 8 | X | X | connected to the integrated SPI flash | NOT REQUIRED | |
| 9 | X | X | connected to the integrated SPI flash | NOT REQUIRED | |
| 10 | X | X | connected to the integrated SPI flash | NOT REQUIRED | |
| 11 | OK | OK | connected to the integrated SPI flash | NOT REQUIRED | |
| 12 | OK | OK | Boot fail if pulled HIGH | YES | |
| 13 | OK | OK | YES | ||
| 14 | OK | OK | outputs PWM signal at boot | YES | |
| 15 | OK | OK | outputs PWM signal at boot | IR_RX | YES |
| 16 | OK | OK | LoRa_DIO0 | YES | |
| 17 | OK | OK | IR_TX | YES | |
| 18 | OK | OK | LoRa_SCK | YES | |
| 19 | OK | OK | LoRa_MISO | YES | |
| 21 | OK | OK | SDA | YES | |
| 22 | OK | OK | SCL | YES | |
| 23 | OK | OK | LoRa_MOSI | YES | |
| 25 | OK | OK | EC_1 | YES | |
| 26 | OK | OK | EC_2 | YES | |
| 27 | OK | OK | LoRa_RESET | YES | |
| 32 | OK | OK | EC_9 | YES | |
| 33 | OK | OK | EC_10 | YES | |
| 34 | OK | input only | EC_4 | YES | |
| 35 | OK | input only | EC_5 | YES | |
| 36 | OK | input only | EC_6 | YES | |
| 39 | OK | input only | EC_3 | YES |