2 Sets LoRa32u4ii Lora Development Board Module, JST-PH2.0mm-2P Connector, IPEX Antenna, ATmega32u4 SX1276 HPD13A 915MHz 868MHz, for Arduino UNO Mega 2560 Nano

I ordered this board from a couple vendors so review will be the same. This makes a great arduino RF sensor station. Using RadioHead "RH_RF95.h" library. I have several off them, send data, go to sleep, send data again, sleep. If your receiving RF on a different type board you need to make sure your data structure is the same size in bytes because not all MCU's are the same. I found using a "short" is most compatible.1. I used the "Adafruit Feather 32u4" board in the adruino IDE. Pinouts match the 32u4 feather2. Sleep current is 0.13ma using "LowPower.h" library which also has sleep interrupt to wake up.3. Enable pin is great if you wont to use a voltage detect to shut down the regulator if Battery gets low.4. It has a solder jumper to up the charge current to 500ma. I have a 5v solar panel plugged into the 5V pin with a large 4700uf cap.5. Uses the standard JST 2mm LiPo battery connector and it charges battery fine. Battery connector is on top easy to access.6. You can put it to sleep for how ever long you want by calling a "for" loop. int i; for (i = 0; i < sleepCycles; i++) {LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);}7. Has a onboard battery voltage divider to read the battery voltage using pin A9.8. Adjustable antenna is nice9. Fits bread board with an extra row of pins on each sideIf you only need it as a RF station to send data, no OLED or WiFi this board is way better then the Heltec WiFi Lora esp32 kit board which Im swapping all mine out for this LoRa32u4 Board. The only pain is ass with all 32u4 MCU's is the serial monitor and sketch upload is a bit troublesome till you figure it out. Need to hit the reset button once upload starts. I wish it had an SMA connector for the antenna

zero docuemts, zero support.even their "tutorial" video on the Amazon page is so low quality, you cannot see what is going on, and even worse, they are not talking in English

I bought four of these boards because I fried one of the by hooking it up to a 2.4A USB output. I would suggest only powering them with a 1A USB output.I bought a LiPo battery to power it and found out that the polarity is reversed on the battery, so be careful of that issue as well.Plugged reversed the polarity on the LiPo and found out that it would not power from the JST plugin that is made for the battery. My solution was to splice the Micro USB, LiPo, and male JST together to power it by the battery through the USB and use the JST to recharge the battery with the board.As far as other functionality it works good so far. Used some code from the radio head library and modified it to send communication from one board to another while being externally powered. Suggest using adafruit feather libraries with Arduino IDE for board support. If you look on the Adafruit website it will give you step by step instructions on how to configure everything.

Uses the same 32u4 microcontroller as the Arduino Leonardo so it can be programmed to act as a USB 2.0 HID device such as a keyboard, mouse, or joystick. When using as a battery powered sensor, by setting most pins to OUTPUT and LOW, powering down the radio with "LoRa.sleep();", turning off the USB interface with "USBCON |= (1 << FRZCLK); PLLCSR &= ~(1 << PLLE); USBCON &= ~(1 << USBE);", and entering deep sleep with "LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);", I have been able to drop the power usage down to as low as 57 µA. The main problem I've run into is inconsistent quality, I've so far bought 8 of these boards and, using the exact same low-power sketch, five have used between 57 and 65 µA, and three used 2.5mA. I returned two that were using 2.5mA and Amazon sent me two replacements, one used 57.2µA and the other used 81µA. I used the sandeepmistry arduino-LoRa library and the rocketscream Low-Power library.

This board appears to a clone of the Adafruit 32U4 LoRa board. It is not, and it is not a simple task to get it working.The board was designed by BSFrance and sold through DIYMall. To use the board you need to (1) go to GitHub and download and install the board characteristics, (2) install a new radio library, (3) install the Zidek loader on your computer, and (4) download and install the virtual USB driver (from GitHub) unique to this board. Having done all that, my computer could not recognize one of the pair of boards and said it was defective. After trying several "work arounds", I gave up and tossed both boards in the trash. A waste of time and money.I put together a LoRa pair using Arduino Nanos and a separate SX1278 boards for a fraction of the price and the system works great.

The circuit board looks very clean and compact. Plan to use it for some monitoring and remote control applications. Initially prototype testing but later may be incorporated into a product.

The LoRa works pretty good, and I’ll find a use for these boards. The reason I bought these was to use both WiFi and LoRa. Review is based solely on the misleading description.

Well it was short lived, I disconnected the antenna from the main board to place in a 3D printed case and it appears that it had cold solder joints and the antenna connector separated from the main board. Short of buy a hot air rework station I am taking a loss on these......EDIT:I had to reorder these as I need these types for my project so hopefully these will not break...2nd Edit:I stripped the end of the broken antenna cable and managed to solder the wire directly to the board and it worked... So being that I have it working I upgraded to three stars....