Will the mesh boards have fuelgauge?

[nrobinson2000]

I’d love to be able to get the state of charge of the battery on mesh boards.

[RWB]

I was wondering the same thing.

If they are like the Adafruit boards with just a charging chip then they may just use a single ADC to figure the battery voltage. Which would make sense on the low-cost Mesh only boards since they want to keep the cost low.

If they do add a separate fuel gauge chip & PMIC to the cellular boards then I hope they use a better fuel gauge than what is used on the Electron to avoid the SOC not syncing to 100% once fully charged.

[HEng]

@RWB

avoid the SOC not syncing to 100% once fully charged.

I think this is an issue with the (private) battery tuning parameters. The datasheet for that part just says something to the effect of "contact Maxim for information about tuning the system for your battery".

That's pretty frustrating, but I don't see a huge benefit over an ADC battery gauge and a low-voltage detect comparator circuit for low voltage alert.

[RobotChicken]

Any news on this?

[nrobinson2000]

Can Argon (or Xenon) Read the Battery State?

In my opinion, the FuelGauge is pretty accurate. Several assumptions are made, and you would have to make the same assumptions to calculate a SoC independently. I think the misconception comes from the firmware’s default ChargeVoltage at 4.11V for various safety reasons. The SoC shouldn’t be mapped or re-calculated just because 4.11V is the Vmax selected for charging. The SoC does a good job as it uses the known Li-On characteristics to approximate the available chemical energy at any give t…

[RobotChicken]

Found this useful:

Can Argon (or Xenon) Read the Battery State?

There is no fuel gauge chip on the Xenon and Argon. You can, however, read the battery voltage to determine the approximate charge level: https://docs.particle.io/reference/device-os/firmware/xenon/#battery-voltage Particle Battery Voltage