5pcs ESP8266 ESP-01 Serial Wireless Transceiver WiFi Module 1MB SPI Flash DC3.0-3.6V for Arduino (ESP-01)

I got these to have wifi on my Prusa Mini and these worked great. Only thing is I have to reboot tget the wifi to connect.

I bought 30 of these only to discover that they had 2015 firmware. Not all of the AT commands were supported.It took me a weekend to figure out how to reflash them with current software.

I bought these for enable WIFI for my Prusa Mini, and works awesome!Confirm these are compatible.

Drive with a proper 3.3v regulator, and you can then drive MOSFETs for LEDs, and have WiFi control, in the tiniest little package possible.Be sure to "socket" your project in the event you need to re-flash the module, and be sure the module isn't obstructed by metal etc for WiFi operation. I have several of these controlling lights and other projects around the house...

I purchased these to go in modified, outdoor motion sensors. The integration into the sensor was quite simple and Tasmota firmware and MQTT made home automation system integration a snap. The issue I had with this module was very limited WiFi range. Even after altering my circuit board to ensure that the antenna portion of this module was not covered, I needed to add an additional access point close to the sensor. All other IoT switches, plugs and sensors had sufficient signal strength so there is something about this module and its design that limits range.

I use these in projects and they run open source Tasmota firmware

Two out of five boards DOA. Seller responded quickly to my message and has offered to refund the defective boards.

These won't connect to my wifi for more than a few seconds. It's not a signal issues. Other modules work fine