find modules here - esp8266-modules-dat
chip info
common pins
| pin | name | GPIO | function | Note | note |
|---|---|---|---|---|---|
| 25 | U0_RXD | 3 | IO3 | I/O UART Rx during flash programming | |
| 26 | U0_TXD | 1 | IO1 | SPI_CS1 | I/O UART TX during flash programming; |
| 14 | IO2 | 2 | U1_TXD | Flash debug output | |
| 13 | MTDO | 15 | U0_RTS | HSPI_CS | |
| 18~23 | SDIO |
bootstrap
| pin | default boot | Against Mode | ESP-12F-dat | ESP-12S-dat | func |
|---|---|---|---|---|---|
| RESET | pull up + cap 0.1 UF | Reboot | ext. | int. | |
| EN | pull up | Reboot | ext. | int. | |
| IO0 | pull up | Flash Mode | ext. | int. | Boot mode control |
| IO2 | pull up | pull-up w/LED | pull-up w/LED | on-module LED | |
| GPIO15 | pull down | Fail into SDIO Mode | ext. | int. | MTDO |
- reference from chip datasheet section "Pin Definitions" Note part
programmer
- DPR1150-dat - NWI1070-dat for ESP-01/01S
ref
-
design guidelines - Chip-cn-dat/Espressif-dat/ESP8266-DAT/esp8266_hardware_design_guidelines_en.pdf
-
Module datasheet please see here: https://github.com/Edragon/ESP8266-HDK/tree/master/MOD
Common Used