ESP-WROOM-32 ESP32 ESP-32S Development Board 2.4GHz Dual-Mode WiFi + Bluetooth Dual Cores Microcontroller Processor Integrated with Antenna RF AMP Filter AP STA Compatible with Arduino IDE (1 PCS)

I'm using this board in a Home Assistant integration, via the ESPHome Builder integration. I'm using this with an optocoupler and some DS18B20 temperature probes to add sensors for some temperatures, and for whether voltage is present for the pumps of my radiant floor heating system so that I can monitor everything that is going on. Everything is working great, there have been no issues.

Works like any ESP32 but I wish they called out that you need to make sure you have a data micro usb cable since not all of them are. Took me like an hour to figure that out.

Over all the devices seem to work as advertised. There was a problem with 1 that immediatly blew the 1117c chip when it was plugged into PC. The other 2 using same cable and same PC worked just fine. That is the only reason I am giving 4 out of 5. I don't see a reason to be required to send back all 3 to try and get a refund or replacement for just one. That requirement on the form is not the fault of the seller though, just the one bad device is.

I have nine of these devices, for use as Home Assistant sensor platforms. All have worked perfectly using the Arduino 2.4.6 IDE. With dozens of these ESP32 boards out there - some with issues - these have proved to be good.

I was investigating how to enable bluetooth with my Homeassistant installation and found documentation on creating a bluetooth proxy. This item was linked directly on the ESPHome website, which also includes a web-based firmware flasher. Encouraged by how easy this could be, I made the purchase. The competing option was a M5Stack Atom Lite, which looked quite promising as it comes within a case already. After weighing the shipping times, I went with this product. The two are essentially the same price if you factor in a separate case for the ESP-WROOM-32.Sifting through the reviews here, I found that manually installing drivers for the board would be required. If you just plug in the device, Win10 shows a popup but it does not actually install the needed drivers. You will need the easy to google CP210x USB to UART Bridge VCP Drivers, CP210x_Universal_Windows_Driver.zip available from Silicon Labs.After that, the web app flasher was easy to run. It wrote the FW needed and then lets you specify your wifi network. I had read many reviews that were disappointed with horrible wifi range. I am 1 floor below my router and it shows -71dB signal. Not great, but still functional. Maybe that's not bad considering there's no antennae. Other wifi devices in the same room were about -65-70dB.Immediately after connecting to wifi, Homeassistant recognized the device and it was easy to add it as an ESPHome device. It easily found the 3 bluetooth thermometers I wanted to connect (Thermopro TP357). I haven't had any notable dropouts for this first week but will continue to monitor.As the last step I am purchasing a case for the board. There are some generic plastic boxes available on Amazon, but I decided to go with Etsy for a custom 3D printed one.

These units boot, can be attached to via Putty, but are showing an operational state of STA (station) + SoftAP. I believe I will have to flash the ESP32 manually over SPI. The ESP web tools, Arduino IDE and esptool.py cannot connect via serial port @115200 bps, only Putty can connect. Using the EN (long press) and BOOT (short press) buttons appears to change the operational state to flash the device from external tools connected via SPI, but I have not tried yet.

This is truly my favorite microcontroller packaged into a great development board at an affordable cost.ESP32 works with Bluetooth Classic and BLE for short-distance data streaming. Two of these boards can be connected to each other and share data up to 80 meters away.The Wi-Fi connection is one of the most powerful features. You can connect the board to the internet and communicate with it via a web server. This allows you to make digital applications with physical and analog capabilities. The Wi-Fi communication can also be utilized to make a smart home. You can connect all the ESP32s together and control many different household operations via a Wi-Fi router.The cost is the third big pro. These boards are very affordable for what they can accomplish. This is a must for every circuit lab.I highly recommend this product to anyone who likes building things with microcontrollers.

Great for testing your network.