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 (3PCS)

I bought this ESP32 for a digital seismograph I'm working on. The functionality of this thing is amazing. I was able to hook it up to my ADC without any problems, alongside a micro SD card reader. Not only that but I was able to run a local webserver in which I could see my graph. It's pretty fast too, I haven't had any delays with processing data at all. It's small size and very little required power source makes this great too. It's versatility will allow you to pretty much use any type of electrical component with it, and I have not runed into any compatibility issues so far with any of my parts. Only thing I would consider a con would be that you'll have to learn C++ in order to program it. Overall, I would recommend this board for any type of low power project you may need.

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.

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.

All good

These were the first ESP32s I ever bought, so I didn't really know what I was looking at or for, but they ended up working very well. As I learned more, I realized there are many different types, and it was hard to know what type this was. As someone else mentioned, I ended up using esptool command line tool. Here is what I got in hopes it makes someone's else's journey a little easier. Based on documentation, best I can tell this is the original ESP32 Series, not the S series. Here is what esptool tells me about mine: Chip type: ESP32-D0WD-V3 (revision v3.1) Features: Wi-Fi, BT, Dual Core + LP Core, 240MHz, Vref calibration in eFuse, Coding Scheme None Crystal frequency: 40MHz That confusion aside, they worked great for what I needed, they came package well, with Styrofoam pads protecting the pins and all 3 were in working order. Deducted 1 star for the confusion around knowing exactly what you are getting.

Tested on my ESP32 DevKit board with USB-C connected to a PC while simultaneously powered from a 12V battery through a buck converter (5v). Serial monitor remained connected, ESP-NOW continued running normally, and the board operated without resets or overheating during testing. Obviously verify your own setup and board revision, but on my board I was able to use USB for debugging while the robot remained powered from its normal battery system.

Two of the three I ordered no longer connect to WiFi after a month. They drop the connection even when right next to my router. Happens intermittently for a few minutes, then drops off the network entirely unless rebooted. After several power cycles, I’m lucky to get them reconnected for a minute or two. One even stopped connecting via serial port to my computer. I have several others from other manufacturers being used in the same fashion, and I’m only having issues with this bunch. It’s a minor financial loss, but I’ve spent hours prototyping devices and projects that I eventually soldered before installing them, and now I’ve spent many more hours troubleshooting only to realize that it’s not me, it’s the hardware. Consider purchasing from another seller and manufacturer, even if they cost a few dollars more. Thankfully I should be able to desolder and swap in some more reliable boards.

I bought a set to use as a Bluetooth proxy with Home Assistant and things that were unstable and laggy are now basically instant and perfect. Love it and now I'm trying to figure out how to use the others. Also, these are quite small and super easy to power. Basically, super great value. Oh, if you have issues use ESPHome to flash projects onto your ESP32? Make sure to download the drivers. That threw me for a loop for a bit.

Really useful microcontroller

I had a few old Chinese addresses able rgb strips that just had a very basically controller and crappy power supplies. Install WLED on this board and now all the strips are smart light strips and they perform better than some of the other branded RGB led strips.

Am able to connect sensors and host a server on it!

Ok

Ok