Previous, SW1 was too close to RST, making it difficult to press one
without pressing another. After changing its position, it was more
convenient to route SW1 to pin 10 on U1 - That's P0.30/AIN6 both on
nRF52840 (C) and nRF52833 (E) modules.
I previously used a basic 2N3906 and then changed its footprint to
SOT-23. This led to the wrong pin assignment.
This commit fixes it by using the correct symbol and footprint for it.
Note that the PCB layout still needs fixing.
This will enable us to transparently use different calibration for
different board revisions. The 2.0.0 revision changes the sensing
circuitry and will need its own coeffs.
In this commit, both models are run in parallel for debugging.
- Simplified the fast discharge circuit to use a single PNP BJT instead
of two NPN BJTs
- Swapped nRF52 module's footprint for one with larger pads
- Added a user button tied to P0.12 (same as Button 2 from [nrf52840_dk](https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrf52840_dk%2FUG%2Fdk%2Fhw_buttons_leds.html))
- Added a reset switch
These are only schematic changes - PCB layout is stale and needs to be
recreated.
The API for reporting information requires a pointer to the data value,
and cannot deal with a constant directly. The current quantity/size
returned by the device are random values from memory.
Instead move these values into the prst_batt_attrs_t struct and
set their values in prst_zb_attrs_init.
We were previously relying on the default values (100ms, 150ms). This
PR makes it easier to test and configure parameters for different
tradeoffs between range / power consumption (#98).
The new SDK requires 802.15.4 to be enabled in the board DTS file.
Also disable IPv6 explicitly to avoid compile errors related to its
network stack, since it is not used currently.
Closes#94
