Add a separate tec_set_i cmd to reduce overhead

- miniconf is slow at validating complex struct with large enum lists

src/net/cmd_handler.rs

@@ -153,9 +153,30 @@ pub fn send_status_report(buffer: &mut [u8], laser: &mut LdDrive, tec: &mut Ther
     net::eth_send(buffer, num_bytes);
 }
 
+// Use a minimal struct for high speed cmd ctrl to reduce processing overhead
+#[derive(Deserialize, Serialize, Copy, Clone, Debug, Default, Tree)]
+pub struct TecSetICmdJson {
+    tec_set_i: f64
+}
+#[derive(Deserialize, Serialize, Copy, Clone, Debug, Default, Tree)]
+pub struct TecSetICmd {
+    json: TecSetICmdJson
+}
+
 pub fn execute_cmd(buffer: &mut [u8], buffer_size: usize, mut laser: LdDrive, mut tec: Thermostat, mut device_settings: DeviceSettings)->(LdDrive, Thermostat, bool, DeviceSettings){
     let mut should_reset = false;
     
+    let mut cmd = TecSetICmd {
+        json: TecSetICmdJson::default()
+    };
+    match cmd.set_json("/json", &buffer[0..buffer_size]){
+        Ok(_) => {
+            tec.set_i(ElectricCurrent::new::<milliampere>(cmd.json.tec_set_i));
+            return (laser, tec, should_reset, device_settings);
+        }
+        Err(_) => { /* Do Nothing */}
+    }
+
     let mut cmd = Cmd {
         json: CmdJsonObj::default()
     };