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

Tiny Seed ESP boards work great for putting them into small buildsthey were easy to flash and get running up with my smart home stuff

These little modules run the Espressif ESP8285 chipset rather than the 8266, but this actually adds a bit more functionality but for most programming, you'd never know you were using the newer version. What makes these modules so great for prototype and developing on the 8266 platform is that it has a built-in usb connection and programming reset pin so you don't have to buy a separate cradle to burn ESP-01 modules. The boards are so cheap they work great as throw-away AP's if you need a 'mini router' to host other IoT projects, and the through-hole connections make using the GPIO pins a breeze. If you are programming using the Arduino IDE, you'll find that the standard 8266 examples (webserver, dns responder etc) will all work, and there are actually several wemos specific examples available as well. Great little board!

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}

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.

I flashed Tasmota on Linux using:esptool.py --port /dev/ttyUSB0 erase_flashesptool.py --port /dev/ttyUSB0 write_flash -fs 1MB -fm dout 0x0 sonoff.binConnected to the "sonoff-xxxx" access point it created with my phone, and configured the WiFi. Saved, and then connected to the device on the LAN, configured as module generic 18. Works great! Easiest esp8286/5 device to work with - no programmer or voltage regulator needed. Board quality is great and pins are provided if needed. On-board reset switch is handy.Edit: Because of recent discussions, I just wanted to note that these shipped with the 500ma regulator (S2Px or S2Qx with the distinctive half crescent logo of MicrOne), not the undersized 150ma knockoff regulator (4Ax or 4Bx where x is some random number/letter, and the middle letter does not have an underline). They have more than enough power to supply a typical add-on.

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.

I used this to save a little space & cost for an ESP32 based project that didn't need the full features of the devkit and it works well.