Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 11:24 12 Nov 2025 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Microcontroller and PC projects : HC-12 prints ERROR on any key press

Author Message
Quazee137

Guru

Joined: 07/08/2016
Location: United States
Posts: 600
Posted: 12:30am 31 Jan 2019
Copy link to clipboard 
Print this post



I got four of the HC-12's wired two of them up on two breadboards with power.
USB to serial RXT > TX HC and TX > HC. "SET" pins to ground. I plugged them
into two computers running minicom 8N1.

When I press "A" to start the "AT" I get "ERROR". Does this on both computers.
So I played with minicom settings keeping baud at 9600 went through all
permutations of bits, parity, stopbits. Still prints ERROR at 1st key press.

Even tried 3 different USB to serial cables / modules.
Then tried the other two HC-12's with same results.

Now wondering did I get bad HC-12's

Anyone else have this happen?
 
Grogster

Admin Group

Joined: 31/12/2012
Location: New Zealand
Posts: 9754
Posted: 12:52am 31 Jan 2019
Copy link to clipboard 
Print this post

[Quote]"SET" pins to ground.[/Quote]

That's your problem. You ONLY ground the SET pin, to configure the module - channel and output power, FU mode etc.

Remove the ground references on both module's SET lines, and try again.
Smoke makes things work. When the smoke gets out, it stops!
 
Quazee137

Guru

Joined: 07/08/2016
Location: United States
Posts: 600
Posted: 02:23am 31 Jan 2019
Copy link to clipboard 
Print this post

I was trying to configure them. Well I thought I was then remembered
rob's HC-12 graphical configuration utility.

Using wine I had to start it up then the new wine makes a bunch of com links
had to

rm -i ~/.wine/dosdevices/com1
ln -s /dev/ttyUSB0 ~/.wine/dosdevices/com1

went back to HC config and clicked "OK"
every thing just works now. Thanks rob.

I have two setup as a repeater one at my desk and one with a 170BP for testing
now I need to get eight more to do a real field test.

rob a though for an SC project a 170 backpack with the configuration algorithm
as a way to set these up on the fly in the field.

one more
Where the HC-12 text is make way to select other RF "AT" based modules.
add a few different sockets for them even 3.3V <> 5V

Grogster could do a board.


Thanks rob and Grogster
Edited by Quazee137 2019-02-01
 
Grogster

Admin Group

Joined: 31/12/2012
Location: New Zealand
Posts: 9754
Posted: 06:36am 31 Jan 2019
Copy link to clipboard 
Print this post

Do you think that perhaps Linux was interpreting the AT commands as some kind of internal Linux command thing?
Seems rather unlikely, but....

Tell me more about the board. I would be interested in doing one, if anyone thought it would be useful.
Smoke makes things work. When the smoke gets out, it stops!
 
Print this page


To reply to this topic, you need to log in.

The Back Shed's forum code is written, and hosted, in Australia.
© JAQ Software 2025