ACEIRMC 6pcs ESP8266 D1 Mini WiFi Dev Board ESP-12 ESP-12F NodeMcu Mini Module for WeMos Lua 4M Bytes WLAN WiFi Internet Development Board Base on ESP8266 ESP-12F for Arduino

I'm using these to build temperature sensors and integrate in Home Assistant. They are working well, have had no issues with programming them in ESPHome once I put in the correct settings. I did notice the USB pugs are not soldered in totally straight, but has not effected the cases I 3d printed.Update - Found out that I only got 5 instead of 6, but the seller refunded part of the cost to make up for it. Additionally, I've used 4 of them, one does not load my code properly.

Perfect for IFTTT controlled light strips or anything else your imagination can come up with, as long as your coding ability is up to par!Easily write apps with Espruino, MicroPython, Arduino studio, platformio, or even moddable.1 Analog port, so try to get Serial, I2C or SPI -controllable peripherals! The analog port is probably good enough for a servo or joystick encoder, but probably not sensitive enough for microphone waveform recording.Fits breadboards perfectly, runs on 3v but has a 5v pin (Vin should be direct from USB), and it's about 5/8 the size of a normal NodeMCU esp (lengthwise, same width though so it can fit breadboards).An essential part of any robotics/electronic project where you need wifi/bluetooth connection to any sort of sensor or data logger. Also consider having some esp32's on hand for some of your more advanced projects, as they have some better pinouts, processing power, libraries and extra hardware (camera, sound chip for voice commands, etc.) that are not available to the 8266 series. Check this seller's store as I think they have a variety available.

Super easy to program in various languages. Lots of features. Works with Home Assistant using either MQTT or ESPHome.

Those are great general purpose MCUs and work as intended. Note that there is only a single analog-capable pin though, so maybe not the best if you want to connect analog sensors.

To actually program this thing, you need to short "D3" to "G". "D3" corresponds to GPIO0. Other than that, it seems like a solid clone.