fix tank calculation, update bq34 driver

rust/src/plant_hal.rs

@@ -7,6 +7,7 @@ use embedded_svc::wifi::{
 use esp_idf_hal::i2c::{I2cConfig, I2cDriver, I2cError};
 use esp_idf_hal::units::FromValueType;
 use esp_idf_svc::eventloop::EspSystemEventLoop;
+use esp_idf_svc::ipv4::IpInfo;
 use esp_idf_svc::mqtt::client::QoS::AtLeastOnce;
 use esp_idf_svc::mqtt::client::QoS::ExactlyOnce;
 use esp_idf_svc::mqtt::client::{EspMqttClient, LwtConfiguration, MqttClientConfiguration};
@@ -94,7 +95,7 @@ pub trait PlantCtrlBoardInteraction {
         ssid: heapless::String<32>,
         password: Option<heapless::String<64>>,
         max_wait: u32,
-    ) -> Result<()>;
+    ) -> Result<IpInfo>;
     fn sntp(&mut self, max_wait: u32) -> Result<chrono::DateTime<Utc>>;
     fn mount_file_system(&mut self) -> Result<()>;
     fn file_system_size(&mut self) -> Result<FileSystemSizeInfo>;
@@ -393,7 +394,7 @@ impl PlantCtrlBoardInteraction for PlantCtrlBoard<'_> {
         ssid: heapless::String<32>,
         password: Option<heapless::String<64>>,
         max_wait: u32,
-    ) -> Result<()> {
+    ) -> Result<IpInfo> {
         match password {
             Some(pw) => {
                 //TODO expect error due to invalid pw or similar! //call this during configuration and check if works, revert to config mode if not
@@ -448,7 +449,7 @@ impl PlantCtrlBoardInteraction for PlantCtrlBoard<'_> {
         //update freertos registers ;)
         let address = self.wifi_driver.sta_netif().get_ip_info().unwrap();
         println!("IP info: {:?}", address);
-        Ok(())
+        Ok(address)
     }
 
     fn mount_file_system(&mut self) -> Result<()> {
@@ -620,6 +621,7 @@ impl PlantCtrlBoardInteraction for PlantCtrlBoard<'_> {
                 qos: AtLeastOnce,
                 retain: true,
             }),
+            keep_alive_interval : Some(Duration::from_secs(60*60*2)),
             //room for improvement
             ..Default::default()
         };