es32d26 FAQ

es32d26 I'm trying to use the rs485 option to send messages but I'm having problems with the pin assignments the documentation say that it's io1 IO3 and IO21 but I'm getting nothing but problems when I assign the A+ and B- to pins 1 and 3

1. We've provided an Arduino example; please refer to the example.
2. Please refer to the schematic for the specific pin assignments.

I may have been mistaken about the paper card in the box  it might have been some other stuff I purchased that cam with it  anyway  the video you linked to shows pin 22 and the schematic  on your page said IO1 IO3 and IO21  so it is suposed to be 22 or 21??

The video is another product ES32C14, ES32D26 is 21

Yes. Looks like DI and Counter are working properly.

Could I add a comment on Q2 (short between 5V and GND on the sensor connector)? I am not an electronics specialist, but I am thinking as follows: normally the DS18B20 draws about 1 mA at 5V supply voltage. If I use the silliest wiring and connect a 180 Ohm resistor in series to the 5V input on the probe, the voltage on the DS18B20 drops to 4.85V (acceptable) while limiting the short circuit current to about 27 mA, at which the module still works and the components do not overheat.
I also tried a series resistor of 290 Ohm. The short circuit current dropped to only 17 mA and the module still functioned properly. And without the short circuit, it still measured correctly (the supply voltage on the DS18B20 dropped to a still acceptable 4.7V).
You write: "adding circuits to the sensor end will cause timing anomalies and may not correctly read the data of some sensors". Surely you have more experience with the DS18B20 sensor. Still: wouldn't using a suitable series resistor help reduce the risk of the module malfunctioning and being damaged by a short circuit on the temperature probe? Will using a series resistor really lead to incorrect temperature readings?
I ask for the following reason: we are using cable-connected temperature sensors. And from time to time it happens that the user runs over the cable with a heavy cart, that he pulls the cable out of the connector or sometimes water leaks into the connection connector. In all these cases, a situation may occur where the wires from the temperature probe short out. Therefore, I would like to limit the risk of destroying the module or even blocking the RS485 communication by destroying the module.