SSH into your Raspberry Pi and enter the following commands. It is also better to pull from the 5v rail and have a separate LDO for the ESP8266 module, but pulling directly from a 3.3v rail on the Raspberry pi should work fine. The 33 ohm resistors are necessary to achieve the SDIO speeds required, so please to not leave them out. To use this, you need an ESP-12E or ESP-12F module. I have made some modifications to work with the new linux kernel in the new Raspbian and I have written a script to completely automate the process. This project is based on Hackaday.io RPi WiFi project. If you do not pull down GPIO 15 on boot, as you would when running it as a microcontroller, it runs in SDIO mode and is basically an ESP8089 IC at that point. The ESP8089 is a SDIO wifi chip for small tablets. However, it turns out that the ESP8266 is actually a ESP8089 IC just rebranded. This was largely pointless, because the SDIO interface is used for the flash memory. This is one of my favorite microcontrollers to use for projects because it is fast, cheap, and has wifi.Ī few versions of the module have come out including the ESP-12E and ESP-12F (both around $2-$3) that break out the SDIO interface. It is a very fast microcontroller that runs at 80mhz. It was originally used as a UART serial interface for microcontrollers, but has since been ported over to work as a standalone microcontroller using LUA or Arduino. The ESP8266 IC (if you haven’t heard of it) is an extremely popular Wifi microcontroller with many cheap modules on the market.
This is inexpensive and can get you ~40Mb/s over wifiĪ little history. A better ESP8266 solution is to connect it as a SDIO device on the GPIO port.
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