In my excitement of getting first movement on my machine last night.

CAD & CAM Tool Chain ChiliPeppr
1

In my excitement of getting first movement on my machine last night. I did something to break chilipepper or the JSON server. (It occurred as I was tweaking TinyG settings.

MAC OS.10.12.2
JSON 1.92
FTDIUSB serial Driver 2.3

Symptom:
I can talk to the tinyG using cool term.
$ & $$ returns appropriate text.

within Chillpeppr I can connect to the SPJS - within the serial port console I only see the following.

?
{“ej”:""}
{“js”:1}
{“sr”:n}
{“sv”:1}
{“si”:250}
{“qr”:n}
{“qv”:1}
{“ec”:0}
{“jv”:4}
{“hp”:n}
{“fb”:n}
{“mt”:n}
{“sr”:{“line”:t,“posx”:t,“posy”:t

commands seem to buffer at the SPJS and not get through to the board.

Im wondering whether or not I inadvertantly changed a board configuration wrt communication settings. (I recall I was tweaking the max jerksetting and set one of them to zero when this first occurred)Here are the comm setting I got out of coolterm.

[ej] enable json mode 0 [0=text,1=JSON]
[jv] json verbosity 4 [0=silent,1=footer,2=messages,3=configs,4=linenum,5=verbose]
[js] json serialize style 1 [0=relaxed,1=strict]
[tv] text verbosity 1 [0=silent,1=verbose]
[qv] queue report verbosity 1 [0=off,1=single,2=triple]
[sv] status report verbosity 1 [0=off,1=filtered,2=verbose]
[si] status interval 250 ms
[ec] expand LF to CRLF on TX 0 [0=off,1=on]
[ee] enable echo 0 [0=off,1=on]
[ex] enable flow control 1 [0=off,1=XON/XOFF, 2=RTS/CTS]
[baud] USB baud rate 5 [1=9600,2=19200,3=38400,4=57600,5=115200,6=230400]

Hopefully Ive just done something dumb

2

You probably have the serial port still open in cool term so spjs can’t open it

3

Ah, that was it, i think I was also neglecting to restart SPJS. Thanks - problem resolved. (I did do something Dumb!!)

4

BTW, I now run SPJS with the -v all the time just to look at what it thinks is going on. I’ve had no more task usage run crazy and run the nodemcu at 115200 with no problems.

5

@Steve_Anken great that’s a good tip Steve. No sooner had I shut town cool term and thought it was aok, it stopped working again. Inexplicably

6

So after more experimenting I retraced my steps and as mentioned I did set $xjm=0. X Jerk Maximum to zero. This does send the TinyGv8 into a bit of a loop and blocks JSON communication. When I set it back to 20 million the board returned back to normal and worked fine again.

I repeated the process and set $xjm =0 and found that to was quite reproduceable -

Why was I motivated to do this you ask… it is because the clear path servos I am using have their own mass reaction tuning capability to determine setting such as jerk, and I dont want to have multiple jerk compensations conflicting with one another. I post this on the TinyG forum.

Feel free to reproduce this if you wish but you will have to reinstate the setting using coolterm

7

Our just try default buffer in spjs widget as that makes ChiliPeppr act like cool term. What if you use jerk of 1 or 10 or something so low it almost doesn’t exist?

8

@jlauer oh I’ll give that a try, and yeah I’ll try setting a low but not zero value.