cleanup

config.json

@@ -1,6 +1,7 @@
 {
     "database": "./VEDirect.db",
     "device_name_voltage": "0xA10C-HQ2535PVZGE",
+    "test_duration_seconds": 1,
     "voltage_off": 23.0,
     "voltage_recover": 24.0
 }

src/main.rs

@@ -2,7 +2,6 @@ use rppal::gpio::{Gpio, OutputPin};
 use serde::{Deserialize};
 use serde_json;
 use sqlite;
-use std::error::Error;
 use std::env;
 use std::fs::File;
 use std::path::Path;
@@ -13,18 +12,18 @@ use std::time::Duration;
 const GPIO_SWITCH: u8 = 24;
 
 // set duration of pin switching test
-const TEST_DURATION: u64 = 1000;
 
 #[derive(Deserialize)]
-#[derive(Debug)]
 struct Config{
     database: String,
     device_name_voltage: String,
+    test_duration_seconds: u64,
     voltage_off: f32,
     voltage_recover: f32,
 }
 
 #[derive(Deserialize)]
+#[allow(non_snake_case)]
 struct DbData{
     V: String,
 }
@@ -44,24 +43,26 @@ fn main () {
         match action {
             "on" => pin_switch_on(),
             "off" => pin_switch_off(),
-            "test" => pin_test(),
+            "test" => pin_test(&config),
-            &_ => todo!("So far only the parameters 'on', 'off' and 'test' are supported.")
+            &_ => println!("So far only the parameters 'on', 'off' and 'test' are supported.")
         }
     }
     else { // no command line parameter set; check for voltages and switch the inverter accordingly
-        pin_status();
+        let pin_status_cur = pin_status();
         let voltage = get_current_voltage(&config);
 
-        if voltage < config.voltage_off && pin_status() > 0 {
+        if voltage < config.voltage_off && pin_status_cur > 0 {
-            println!("Siwtching off inverter due to low voltage!");
+            println!("Low voltage!");
             pin_switch_off();
         }
-        else if voltage >= config.voltage_recover && pin_status() == 0 {
+        else if voltage >= config.voltage_recover && pin_status_cur == 0 {
-            println!("Voltage recovered! Switching inverter back on.");
+            println!("Voltage recovered!");
             pin_switch_on();
         }
         else {
-            
+            // no change in status needed
+            let pin_status_text = if pin_status_cur == 0 { "off" } else { "on" };
+            println!("No change in inverter status. Current status: {}", pin_status_text);
         }
     }
 
@@ -69,7 +70,7 @@ fn main () {
 }
 
 fn pin_status () -> u8 {
-    let mut pin_level: u8 = Gpio::new().unwrap().get(GPIO_SWITCH).unwrap().read() as u8;
+    let pin_level: u8 = Gpio::new().unwrap().get(GPIO_SWITCH).unwrap().read() as u8;
     return pin_level;
 }
 
@@ -77,17 +78,19 @@ fn pin_switch_on () {
     let mut pin: OutputPin = Gpio::new().unwrap().get(GPIO_SWITCH).unwrap().into_output();
     pin.set_reset_on_drop(false);
     pin.set_high();
+    println!("Inverter switched on.");
 }
 
 fn pin_switch_off () {
     let mut pin: OutputPin = Gpio::new().unwrap().get(GPIO_SWITCH).unwrap().into_output();
     pin.set_reset_on_drop(false);
     pin.set_low();
+    println!("Inverter switched off.");
 }
 
-fn pin_test () {
+fn pin_test (config: &Config) {
     pin_switch_on();
-    thread::sleep(Duration::from_millis(TEST_DURATION));
+    thread::sleep(Duration::from_millis(config.test_duration_seconds * 1000));
     pin_switch_off();
 }