In today’s mailbag, this little number entitled WeMos® TTgo ESP32 WiFi + Bluetooth Board 4MB Flash UNO D1 R32.
This isn’t the cheapest ESP32 out there (though it is not expensive either) - some of the simpler ones with merely 2 lines of connectors and a USB socket are cheaper – but then they’re not size compatible with Arduino boards (if that is important to you).
I WAS going to gripe that the v1.0.0 board has somewhat un-sharp lettering but I note in the ad that the board is quite readable. So this board has, as well as the microUSB connector, a sizeable power connector as you might see on a UNO board, however it WILL power up successfully simply plugging in the microUSB.
When I turned mine on – as well as the power light – there was the usual BLINK sketch running a blue light. In operation, everything runs, as you might expect, absolutely cold.
I’m using the Arduino IDE version 1.8.5 on Windows 10 64-bit and the ESP by ESP8266 community package 2.3.0 installed. At this point I realised that the ESP stuff does not include the 32 and that a separate install is needed. Thankfully Banggood provided a link (in their ad) to the official ESP32 section of the Espressif site. I was somewhat disappointed on initial viewing to see that at the time of writing, it would seem ANALOGWRITE has not been implemented. Surely, the ESP32 has now been out for some considerable time, you’d think that kind of thing would have long-since been sorted.
Anyway, I followed the instructions here for installing ESP32 under Windows… selected a NANO32 board and 5 minutes later I was all done. I fired up the IDE. (This is the abbreviated version – at first I figured I’d just download the ZIP file – erm – no – follow the instructions EXACTLY to avoid disappointment).
I ran the blink sketch and – it compiled – absolutely no problem – but no flashing light – clearly the BUILTIN LED wasn’t going to have it… then someone suggested GPIO2 – which is now happily blinking away on my desk!
Today a simple flashing light… tomorrow?
(If you’re reading this around the start of November – see if you can take advantage of Banggood’s discount fair).