@vkichline said in [Solved] GPS Unit (AT6558):

@liemph; I'd be happy to share my code, but all the GPS-related parts can be found in the product examples here:
https://github.com/m5stack/M5Stack/tree/master/examples/Unit/GPS_AT6558
The example is pretty complete, but unreadable.

The project I'm working on is more display oriented, and most of the code is a nascent control class I'm playing around with for solving general display problems. You're welcome to take what you like from it:
https://github.com/vkichline/GPSTest

I plan to pursue the display controls in another project, so I won't be updating this one.

Thanks a lot.

@vkichline Could you share the code?

Check the pin layout of the two units:

@Kris The ENV unit uses I2C interface while the Relay unit uses a single bus (simple digital i/o) interface. For example, if you use M5Stack Fire, as default, the ENV unit is connected to Port A (I2C) and the Relay unit to Porb B (I/O). For some reason, if you really need to use Port A for your Relay unit, of course, you can. But you have to carefully program the correct pin of Port A to work as an output port to control the relay. To be more precise, the pin for SDA of (I2C) (yellow color) of Port A should be programmed to be an output pin (corresponding to the REL pin of your Relay unit). For this particular case, the fourth pin (SCL, white color) of the Port A is not used. The same grove cable can be used for both units. Good luck.

@m5stack @diana
This is my simple project for this contest.
https://www.hackster.io/liemph/m5stack-based-anti-covid-security-gate-proof-of-concept-8a1724
https://twitter.com/liemph/status/1307930796032835584
https://www.youtube.com/watch?v=gcSWKrNkmb0

I bought it from the official store in Aliexpress:
https://www.aliexpress.com/item/4000481165186.html?spm=2114.12010612.8148356.1.eed67573HQiQdi
The base has also a battery included, so it will work without external power supply. But if you drive motors for a long time then you need to supply with external power. It has a DC connector for this purpose.

@gabriele That is the most regretful part of buying Fire. Now I am using the Fire with other bases such as Base-X for playing with my Lego motors. In this case, you definitely have to unplug the battery base.

I also have difficult times with M5Stack Fire particularly. The symptoms you mentioned also occurred in the past. The last resort I have done and it seems working is by opening the base which contains the battery. Unscrew the base, detach the base from the CPU. Connect your USB cable to your PC. The Fire will respond. Good luck.

@anuj01 Another alternative is to use the M5 official IO expander unit.
https://m5stack.com/collections/m5-unit/products/official-extend-serial-i-o-unit
M5StickC has an I2C grove port, and you can connect this unit to it. I have tested and it works. Good luck.

@ipodlux For the time being, I stopped using uiFlow (or Python) for IMU related project. It is not reliable and it is slow. Use Arduino IDE, you will have a much faster code and reliable result.