Precaution Usage of this board needs some RTL8710 or SWD programming experience. At least we need to upload binary produced by Arduino source with your WiFi's SSID and Password. Sample code for SSD1306 OLED BME280, MCP3021 is available at github. Programing this board requires J-Link or similar SWD programmer/debugger. This board supports 802.11b/g with WPA (or WEP), and if you need initial test without programmer, I can write binary with your WiFi's SSID and its password. Please let me know in your order with SSID/PASS in "additional info" (Of course, I will keep it confidential.)

What is it?

Tiny prototyping board based on RTL8710 module with BOSCH BME280 (temperature, humidity, and pressure) and MCP3012 (10bit A/D for LiPo voltage monitor) and solar-cell driven LiPo charger

Why did you make it?

All the battery driven system needs is "recharging system" for continuous use. BUT if the battery is re-charged by sunshine, we don't need to care about battery replacement anymore. In addition, WiFi based system (other words, simple TCP/IP system) is much easier to implement compared to BLE, which requires additional application development. (WiFi minimally needs browser.)

What makes it special?

Temperature, humidity, and pressure are live-monitored through BME280 I2C sensor. In addition, current LiPo voltage can be monitored though MCP3021 I2C 10bit A/D converter.

Recommended programming environment is RtlDuino by the great Russian programmer, but also Realtek genuine environment works. For programming, you will need CMSIS-DAP like Ameba Writer (my product) or J-Link.

What is included in this set

• Main board

• Max 6V/0.33A 2W solar cell

What is NOT included but indispensable for operation

• LiPo battery (single cell, 3.7V and more than 1000 mAh is preferable for continuous 24/7 operation)

• Programmer, Ameba Writer (my product) or J-Link.