HiLetgo ESP32 LoRa V3 SX1262 0.96 inch OLED Display Development Board WiFi Bluetooth Dual Core 240MHz CP2102 and 433-510MHz Antenna for Arduino Smart WiFi LoRa 32(Unsoldered)

This dev board is like a toolkit! The ESP32 chip has pretty deep resources, so it supports extensive sketches (want GPS integrated with WIFI and LORA?) Upon opening, I was surprised at the quality of the product. I've had microcontroller boards before with poor solder joints, and unreadable masks. Not the case here. Everything was lined up perfectly, and the display is very cleanly integrated into the module. It even came with stickers for pin labels. Came pre-loaded with a test program which runs a wifi scan, tests the OLED, and sends LORA packets. After adding the Heltec board info and library through Arduino, I was able to immediately start uploading examples and start testing with bluetooth, wifi, and LORA. There are several GREAT write-ups online if you google 'heltec esp32 lora', although I never even needed to reference them, it was great to know I had a fallback. Great board, well built, easy to use, I will definitely be using more of these.

This little board is amazing for building out projects that require low power (ie solar) and just can't be brought close enough to reach over wifi. The LoRa radio comes with the 433Mhz antenna which probably is the best balance for bands that you can operate on without a license for these types of applications. It has decent range but high enough throughput that it won't take half an afternoon to dump sensor data you are collecting. The JST and charging circuit do give you options to add some cells if you just plan on servicing the installation now and then. Finally, the OLED screen doesn't draw much power, but has plenty of real-estate to read out network stats, sensor readings etc if you need some feedback without hooking it up to a computer. The board boots up right out of the box and is compatible with several Arduino libraries if that's your preferred method of programming (see the attached video). Overall a great little board and for the price, it's hard to beat!

I bought a couple of these to run Meshtastic. They work as expected, only issue is that the antenna that comes with them is not resonant on the correct frequency, so completely useless. Mine were both resonant around 433 MHz, so European LoRa frequency and not US.

Nifty little board. Like the other ESP32 boards it is easy to program via Arduino. It comes with a sketch flashed which detects local WiFi hotspots and it easily picked up mine and my neighbors' routers. The LoRa functionality is something I'd like to dig into. Two neat features about this board: The screen is mounted on a translucent standoff which makes it 0.2" proud of the circuit board. This is nice for packaging into a case for projects that need to look nice and clean. Some other boards have the screen flush to the PCB which makes packaging difficult without having the display recessed. Also, there's a battery connector on the back of the board! It is a Micro JST connector for lithium polymer batteries (3.7v). These are commonly used in small RC airplanes and helicopters. A quick Amazon search will find you plenty of options. The attached picture shows a typical battery with the right connector, and the board in operation under battery power.

I have tested with multiple sketches and different libraries and my screen does not work. I watched a video on YouTube and I think it’s supposed have a sketch on it so you can see it working and I got nothing.. tested the WiFi and that is good

Works well for Meshtastic. This board was really easy to flash with Meshtastic's web flashing utility and has been working great for me.

This review is for HiLetgo ESP32 LoRa with oled display board. The first impression of this board is that the oled is seated on a plastic base. That makes the board looks very well built and sturdy. The oled is a SSD1306 display with I2C connection which should be quite popular and easy to use. So far, I have tested wifi, the display, the built in hall effect sensor and touch sensor. They all working great. I used Arduino IDE for my testing and all the drivers can be found from the description of the Amazon product page. Last but not least, the back side of the board has a battery connection that allows to connect a lithium battery to power this board. One thing I didn't really try was the Lora because I only bought one board. I should have bought two of these boards. However, with that said, I am planning to get another one to try out the Lora functionality. Highly recommended !!

Okay, for all you TinyGS types. NO, this board does not work. Why? It is not compatible with the V2 boards, the compiler and pins are different and the documentation is not great. Perhaps this will improve over time, but for now (May2023) it seems like they rushed this out and it is difficult to get things working. The pin mapping documentation and Addresses are not on the web site or are incorrect. Steer clear of this unless you're ready for some hacking.