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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