HiLetgo 3pcs ESP32 Mini ESP-32 Development Board WLAN WiFi Bluetooth IoT Development Board

Works as advertised.

Got this little gem to work using the Arduino IDE within about 5 minutes of research. I grabbed the ESP32 Mini ESP-WROOM-32 Development Board. Don't be confused like I was reading the other reviews. I installed the esp32 v2.0.11 board package in the Arduino IDE and used the LOLIN D32 board that came with the board manager. Serial Monitor is working great along with a simple blink program. Here's a simple program you can run just to verify the LED blinks and outputs data to the serial connection. Overall, a solid 5 stars!#####################################include <Arduino.h>const int ledPin = 2; // The onboard LED is usually on GPIO 2int counter = 0; // Counter to keep track of LED blinksvoid setup() {pinMode(ledPin, OUTPUT); // Initialize the LED pin as an outputSerial.begin(115200); // Initialize serial communication at 115200 baud}void loop() {counter++; // Increment the counterSerial.println(counter); // Print the counter value to the Serial monitordigitalWrite(ledPin, HIGH); // Turn the LED ondelay(1000); // Wait for 1 seconddigitalWrite(ledPin, LOW); // Turn the LED offdelay(1000); // Wait for 1 second}

The module has a 8285 chip on it, but if you try to use the 8285 board profile in Arduino IDE, you'll probably have problems like I did. You'll be able to easily flash a program onto it, but if you try another program it will lock up or refuse to flash. If you're using Arduino IDE, these are the settings I've had best success with: (see image). Don't forget to add the /stable/package_esp8266com_index.json into the board manager to install, Google for the full link, and install the driver per the directions from (oddly enough) the Wemos site for the 'Wemos D1 Lite' board. It's a generic 340/341 driver, so it works fine.That being said, so far after I figured that bit out, they work great. Powered by 5v usb, you can pick up a bunch of USB chargers for cheap on Ebay, and hook up other modules. Be careful when soldering, if you're not fast enough you'll burn out the connections and have to replace the board. I'm terrible with soldering, anyone with a good iron and steady hands shouldn't have any problems.Update: Tried the standard Wemos D1 Mini Lite board profile in Arduino IDE on a (different) Windows machine, worked great. Perhaps my boards installation needs a redo on that machine. Still, works with generic esp8266 profile too.

I had a lot of problems getting the Bluetooth interface to work with windows. It seems to work work in other environments. After a bit of research, I found that some of the older libraries work OK but were broken at some point. I also found that code developed on the Arduino IDE works but the PlatformIO library does not. I do not have the development tools to find the issue in the code so took a different approach. The actual hardware seems OK.

Both of the devices that I purchased seem to work fine. These devices can take from 15s to 60s to connect to my one 2.4Ghz N AP that is 3ft away, but are quickly connect to another AP. Not sure if this is related to logic or the antenna on the 8285 is that may be much weaker than other 8266 boards. Other boards seem to exhibit this as well.Connect using the standard CH340/341 USB driver for your OS. Be sure to select the 8285 board in the Arduino IDE board menu (if you select 8266 you may have issues).And the one piece of info that you'll rarely see posted:Tools->Reset Method, set it to "nodemcu". This is often the reason of issues with uploading/executing.I've wired up a few environmental sensors including the DS18B20 (via 4.7K ohm resistor off 3.3v and pin D5) and had no issues.Using Arduino IDE v1.8.8 at the time of this review.

This review is for ESP8285 wireless development board from HiLetGo. First of all, the purchase comes with two packs of ESP8285. In term of hardware, the ESP8266 is a well known wireless microchip, this ESP8285 is essentially an ESP8266 + 1MB of flash space. With the built in flash, it makes this Wemos D1 lite less bulky compared to Wemos D1 mini. In term of software, the easiest way to program this chip is to use Arduino IDE. You just need to select Wemos D1 Lite in the board setting. Keep in mind that ESP8266 and ESP8285 are the same chip, so any existing esp8286 sketch should theoretically work with this chip (given the flash size is large enough as esp8286 has external flash which might be greater than 1MB.).I installed one of the example sketches called "CheckFlashConfig". Indeed, it confirms that it has a flash size of 1048576 bytes. So far I don't have any issues using this board and I am very satisfy because it is very easy to use.

I use Wemos d1 minis for home automation components. I have purchased at least 50 of them from various vendors. I tried these for the price, but half of them were non-functional upon power-up and another 3 failed after being on for less than an hour. Diagnosing the issue, the voltage regulator and the chip itself are running at 120+ degrees F without the board being plugged into anything but the USB connector and the board is running the blink sample with 500ms delays so it isn't running anything intensive. Other D1 minis from other vendors, their chips and voltage regulators typically run approx 10 degrees over ambient temp. Do be fooled by the low price. My advice...find another source.