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Sensemakers ESP8266 demo board
Gijs Mos edited this page Aug 28, 2019
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Sensemakers Amsterdam have selected a demo board to be used on various educational projects.
The board can be purchased on AliExpress here and here.
The board contains:
- an ESP8266 WiFi enabled MCU with 4MB flash on an ESP-12f daughter board (datasheet);
- a 4 pin plug-in connector with ground, 3.3V, GPIO14 (SCL) and GPIO2 (SDA), normally used for the OLED display;
- a Yiwei Tech 128 * 64 pixel monochrome I2C OLED display on address 0x78;
- a 3 pin plug-in connector with ground, 3.3V and GPIO5, meant for an DHT11 or DHT22 temperature/pressure sensor;
- a CH340C USB to serial interface;
- Power 5V from the USB and 3.3V from an on-board 1117-3.3 regulator;
- Power on/off switch and power-on led;
- All relevant ESP8266 pins broken-out to male headers;
- Green LED on GPIO4 (low = on);
- Blue LED on ESP-12 daughter board on GPIO2. Since GPIO2 is also used as SDA, this LED cannot be used when I2C to the OLED display is in use.
For use with micropython (gory details are here) Sensemakers has devloped a library.