Encoder

[MGLove]

I am struggling to get an encoder reading with the 4rel4in HAT. I have the "a"encoder wired to the IN1-com and "b" to the IN2-com. I am powering from another source. I can get the Relays to turn on and off so I know i have the library loaded. I am trying to have the encoder count for me or just give me a signal for A and B .
Thanks for your help

 

[alexburcea]

Hi,

The encoder function is not enabled by default so you have to enable it. Open a terminal and type "4rel4in 0 cfgencwr 1 1" or use the set_encoder_cfg function in python.

 

[MGLove]

I did use set_encoder_cfg. tried (1,0). And (1,1)

 

[MGLove]

Maybe I will try to set that before my while loop

 

[MGLove]

Hi,

The encoder function is not enabled by default so you have to enable it. Open a terminal and type "4rel4in 0 cfgencwr 1 1" or use the set_encoder_cfg function in python.

No luck attached is my Python code simple just to get a feel of how it should work

 

[MGLove]

Cant copy my code here but I have everything else working do you have any sample code I could look at. I have set_encoder_cfg(1,0) and (1,1) if i set to (1,1) I get an repeating 1 and same with 0. looking for 32 bit

 

[alexburcea]

I do not see your code but there is an example attached to the library.

 

[MGLove]

GitHub - MGKLove/RPi_4rel4in_encoder

Contribute to MGKLove/RPi_4rel4in_encoder development by creating an account on GitHub.

github.com

 

[alexburcea]

Hi,
This is the way you ca use the encoder except the fact that there are 2 lines of code that does not do anything. Adding the readed value with the total variable which you just put zero into it will have no meaning. The get_encoder() function will give you the accumulated value so you do not need to keep a variable for that.
Can you tell me which encoder you use and how you wire it to the card?

 

[MGLove]

My simple code.

Hi,
This is the way you ca use the encoder except the fact that there are 2 lines of code that does not do anything. Adding the readed value with the total variable which you just put zero into it will have no meaning. The get_encoder() function will give you the accumulated value so you do not need to keep a variable for that.
Can you tell me which encoder you use and how you wire it to the card?

 

[MGLove]

Also if you have a recommendation for an encoder that would be helpful.

 

[alexburcea]

Hi,
A datasheet for the encoder and a wiring diagram will be helpful. Is hard from the picture to see where you connect the wires but the fact that there're only 2 is definitely wrong. The inputs are optoisolated so you have to power the optocoupler LED, this lead you 2 wires per channel and the encoder have 2 channels, totally 4 wires (or 3 if one is common).
I tested with something like this https://www.farnell.com/datasheets/2006163.pdf

 

[MGLove]

I am currently connected to the COMs 1 and 2 where should the other two wires from the encoder connect on the HAT?

 

[alexburcea]

Please give me a datasheet of the encoder and so I can help with connection's.

 

[MGLove]

Sorry about the delay. atttached is a copy of the Data sheet. again if you have an encoder that you know will work I will find one.

 

[alexburcea]

Enable encoder interface #1

 

[MGLove]

that helps ! thank you