Apart from what kolban said, I would like to add two comments: 1) Nowadays there are a lot of cheap (Chinese) USB cables that can only be used for charging or powering devices. I assume these have only 2 out of 4 wires: ground and +5V, but no data lines. If you would use a cable like that, the resul...

RS485 uses a different electrical signal. It is balananced (the signal has a + and - so no ground) in order to make it more resistant against interference. RS485 is designed to work with long cables (up to 1000 meters I beleive). So yes, you will need a MAX3485 (or equivalent) in oder to connect it ...

I know it has been a few weeks, but I ran into similar problems, solved them and would like to share. I use a MAX-3485. Basically a 485 but for 3.3v instead of 5v. I couldn't get anyting to work using standard libraries. I used one of the many hardware examples in wich the DE and /RE are connected. ...

I've solved this issue. Well, I didn't really solve it, but I found a workaround. After talking to copercini (the author of the lib) and doing some experimenting with adding delays at various points in the code (wich helped a bit but didn't really solve the issue), I modified my code to send larger ...

Connecting multiple devices to the same network works for me. Did you try compiling with debuging enabled? Do you have access to the wifi access point, could you maybe get some debugging info from there?

It is. I had some trouble pasting the code and I messed it up.

Thanks for pointing that out. I'm quite sure it's a bug, but I don't know if it's a bug in the SDK or in WiFiClientSecure. The code is below. This works, but if I change WiFiClient to WiFiClientSecure (and change the port from 80 to 443) it works only if I compile the sketch with verbose debugging e...

One of the nice things about the ESP32 is that pins are not hard wired. So you can use different pins if you like, just like SoftwareSerial. The big difference is that it's not done in software, but the ESP32 rewires the UART to the pins you specify. On the devboard I use for instance, de default pi...

No one? Wrong category? No one interested in using the security features of the ESP32 (that would be consistent with most IoT devices out there), or just no one who has a solution?

Hi, I'm working on a datalogger. The thing is supposed to pass measurements on to a webserver. That part works. Over SSL using WiFiClientSecure. If the network or server is unavailable, I want to store data on an SD card. Works too. But, when I'm trying to upload this (text) file to the webserver ov...