Support for the SparkFun ESP8266 Thing modules. More...
Detailed Description
Support for the SparkFun ESP8266 Thing modules.
Overview
The SparkFun ESP8266 Thing and SparkFun ESP8266 Thing DEV are low-cost and easy to use breakout and development boards for the ESP8266. Both SparkFun ESP8266 Thing boards are relatively simple boards. The pins are simply broken out to two parallel, breadboard-compatible rows.
Hardware
MCU
Most features of the board are provided by the ESP8266EX SoC.
| MCU | ESP8266EX |
|---|---|
| Family | Tensilica Xtensa LX106 |
| Vendor | Espressif |
| RAM | 80 kByte |
| Flash | 512 kByte |
| Frequency | 80 / 160 MHz |
| FPU | no |
| Timers | 1 x 32 bit |
| ADCs | 1 x 10 bit (1 channel) |
| LEDs | 1 x GPIO1 |
| I2Cs | 2 (software implementation) |
| SPIs | 1 |
| UARTs | 1 (console) |
| WiFi | built in |
| Vcc | 2.5 - 3.6 V |
| Datasheet | Datasheet |
| Technical Reference | Technical Reference |
| Board Schematic | ESP8266 Thing ESP8266 Thing Dev |
Board Versions
Although the board definition works with both boards, it's important to know that they differ slightly in some features:
| Feature | ESP8266 Thing | ESP8266 Thing Dev |
|---|---|---|
| USB to Serial adapter on-board | no | yes |
| I2C pull-up resistors on-board | yes (jumpable) | no [1] |
| Programming interface | FTDI USB to Serial adapter | USB |
| Reset/Flash/Boot logic | FTDI | USB |
| Battery connector | yes | no (can be retrofitted) |
| LiPo Charger on-board | yes | no |
| LED (GPIO5) | high active | low active [2] |
| GPIO15 broken out | no | yes |
| CHIP_EN broken out | yes | no |
[1] Although the SparkFun ESP8266 Thing Dev has no on-board I2C pull-up resistors, the I2C interface can be used because the ESP8266 SoC has built-in pull-up resistors that are activated by the I2C peripheral driver.
[2] The board configuration defines high-active LEDs. If the SparkFun ESP8266 Thing Dev is used with this board configuration, the LED outputs must be inverted by the application.
RIOT Pin Mapping
The following figures show the mapping of these pin holes to RIOT pins.
Flash SPI pins including GPIO9 and GPIO10 are not broken out. The SparkFun Thing board has solder pads for these pins at the bottom layer.
Flashing the Device
To flash the RIOT image, the device has to be connected to the host computer. Since the SparkFun Thing Dev board has an USB to Serial adapter on board, this can done directly using the Micro USB. SparkFun Thin board has to be connected to the host computer using the FTDI interface and a FTDI USB to Serial adapter/cable. For more information on how to program the SparkFun Thing board, please refer the ESP8266 Thing Hookup Guide.
- Note
- Please make sure the FTDI USB to Serial adapter/cable uses 3.3 V.
Both boards have a reset/flash/boot logic on-board so that flashing is quite simple. To flash the RIOT image just type:
For detailed information about ESP8266 as well as configuring and compiling RIOT for ESP8266 boards, see RIOT-OS on ESP8266 and ESP8285 boards.
Files | |
| file | arduino_iomap.h |
| Board specific configuration for the Arduino API. | |
| file | board.h |
| Board specific definitions for SparkFun ESP8266 Thing boards. | |
| file | gpio_params.h |
| Board specific configuration of direct mapped GPIOs. | |
| file | periph_conf.h |
| Board specific configuration of MCU periphery for SparkFun ESP8266 Thing boards. | |
