Can't communicate with the TinyG since yesterday

Thanks for your help !

I always used coolterm to communicate...

I have never run tgFX :) (until now in fact)

I am using windows 7

When I push the Reset button, the RED light is down, when I release it, the Red light is lighting up right after (no delay)

I tried the $[CR] and $$[CR] with no success.... :(

tgFX can't connect to it to get the fw version...

I tried to update the fw as well, but nothing happen....

But I can see the light TX light up.....

If you can help meeee !!

Hi,
if the board is a bit older than a year, it may not have the bootloader installed (see https://github.com/synthetos/TinyG/wiki/TinyG-Boot-Loader for details).
Am also interested in the answers to the questions in the previous post.

Hi again,

Nop there is boot process on start up.
The LED is solid after 1 to 2 seconds.

I have never tried to update anything on it :)
My Tinyg looks exactly this one : http://www.makershed.com/Synthetos_TinyG_CNC_Controller_p/mksy02.htm

The TX is working when I send something

yes I tried to update threw tgFX (he asked me to after he can't connect to it)

One thing I remember, I have turn my stepper motor while it was connected to my unpowered TinyG. (the tinyg wasn't powered by an power supply)
So the stepper power on the TinyG and might boot it since the stepper became hard to turn.

Maybe the tinyG is lost in his code or something.... ?

I bought it April the 1st :)

Thanks again for your help.
Maybe i have a bootloader ?
Can i try to flash the firmware with avrdude ?

You can always try avrdude (instructions at https://github.com/synthetos/TinyG/wiki/TinyG-Updating-Firmware ), it just won't help you. No flashing light == no bootloader.
But you said you can see the TX light flickering, looks like the firmware is trying to send something out (the boot message).
Let's try the basics instead:

1. unplug the tinyg USB cable, open the Windows device manager. Write down which devices are listed in the communication ports (COM and LPT) category.

2. plug in tinyg USB and power. Do you hear the Windows-sound for new device connected? Look again in device manager, see if a new COM device is now listed (something like "USB serial device COM8"). If you don't have a new device, check the USB cable, use a different USB port, check and/or update the FTDI device driver (see https://github.com/synthetos/TinyG/wiki/1.02-Connecting-TinyG).

3. start CoolTerm, go to Options -> Serial Port. Make sure it is set to the COM port you found in step 2. Write down the old settings and change to baudrate=115200, data bits=8, parity=none, stop bits=1, flow control = nothing. Hit connect. If there is an error message, recheck step 2.

4. press Enter a few times, try to enter "?" or $h a few times. If you get an answer, go to step 99. If you just get some garbled strings, the baudrate is probably incorrect (retry with different values).
If you get no answer: Hold down the Enter key and look at the TX and RX Leds on the tinyg board. If they are flickering, there is basic communication. Try different baudrates. If none of them is flickering, recheck step 2.

5. If you can't get it to work, you will have to send it back to check/repair/update. Even without a working firmware, you should get some flickering on the RX Led.

99. After you have communication:
Enter $fb to get the firmware build.
Enter $ex to see what kind of flow control is enabled in tinyg. Change the settings in CoolTerm to match that, and save your CoolTerm settings.
You may want to return the board to Synthetos anyway so they can install the bootloader on it.

I hope that helps.

Hi,

Thanks for you help.
Unfortunately nothing worked, I tried everything you did.
The only thing weird happen at 38400, when I just pressed enter continuously,
I saw the red light flashing for 1 or 2 seconds.

I need this board for the maker faire Paris, I am french...
It will be cheaper for me to get an AVR programmer
Does this one will work : http://fr.farnell.com/atmel/atavrisp2/programmateur-avr-mcu-isp/dp/1135517

Is there any tutorial ?

I am going to New York next week for business, does Synthetos in NYC ?

My boss came back from makercon with a ShapeOko, I will probably have to use the gshield right now, I hope the gshield can handle enough current as the tinyg

CmcGrath5035 :

I drive a classic stepper driver, nema 17.
Thanks for your link, I have ordered this AVR programmer.

My Arduino + GBRL works fine, I needed fast to test the torque of my stepper.
I put the little heat sink on it.
But TinyG looks smoother on driving stepper at first sight.

Thanks for your support, I will try the AVR programmer tomorow or on tuesday :)

Worked !!
Thanks for your support :)