jtbx/esp32-c_its-companion
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WIP Add battery level readout and publish on BLE

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TODO: show on display when low battery
TODO: ADC readout is not plausible
This commit is contained in:
Jannik Beyerstedt 2026-09-28 11:46:09 +02:00
commit 0b055900cf
4 changed files with 189 additions and 4 deletions
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23
src/main.rs
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@ -59,7 +59,9 @@ mod screen;
#[cfg(feature = "gnss_ubx")]
mod ubx;
mod util;
mod xiao;
const BAT_UPDATE_INTERVAL: esp_hal::time::Duration = esp_hal::time::Duration::from_secs(30);
const WIFI_CHANNEL: radio::Channel = 180;
const WIFI_TXPOWER: i8 = 10; // dBm, 2..20
#[cfg(feature = "spat")]
@ -144,6 +146,9 @@ async fn main(spawner: Spawner) -> ! {
info!("Embassy initialized!");
// Setup battery voltage readout (GPIO6 as input and GPIO26 as enable)
let mut battery = xiao::Battery::new(peripherals.ADC1, peripherals.GPIO6, peripherals.GPIO26);
// Setup ST7789 screen
// SCL: D8/ GPIO8 (SPI_SCK)
// SDA: D10/ GPIO10 (SPI_MOSI)
@ -284,6 +289,13 @@ async fn main(spawner: Spawner) -> ! {
#[cfg(feature = "_gnss")]
info!("GNSS task started, waiting for GNSS fix...");
// Setup main loop
let (bat_percent, bat_millivolt) = battery.read();
log::info!("Battery: {bat_millivolt} mV, {bat_percent} %");
#[cfg(feature = "ble")]
ble::set(ble::BleSendable::BatteryLevel(bat_percent));
let mut last_bat_update = esp_hal::time::Instant::now();
#[cfg(any(feature = "cam_tx", feature = "uart"))]
let (mut seq_no, mac_bytes) = {
// unwrap is fine since [`esp_hal::efuse::MacAddress`] is just an `[u8; 6]`
@ -626,6 +638,17 @@ async fn main(spawner: Spawner) -> ! {
// maintenance
state.prune();
let cpu_now = esp_hal::time::Instant::now();
if last_bat_update + BAT_UPDATE_INTERVAL < cpu_now {
let (bat_percent, bat_millivolt) = battery.read();
log::info!("Battery: {bat_millivolt} mV, {bat_percent} %");
#[cfg(feature = "ble")]
ble::set(ble::BleSendable::BatteryLevel(bat_percent));
last_bat_update = cpu_now;
}
}
}