Read AT Command response properly

src/at_commands.rs

@@ -1,6 +1,10 @@
+use alloc::string::String;
+use alloc::vec::Vec;
 use core::fmt::Write;
 use esp_hal::{Blocking, delay::Delay, gpio::Output, uart::Uart};
 
+static RESPONSES: [&'static str; 3] = ["OK", "ERROR", "DOWNLOAD"];
+
 pub struct ATCommands<'a, 'd> {
     pub rst: Output<'a>,
     pub pwr_key: Output<'a>,
@@ -40,8 +44,33 @@ impl<'a, 'd> ATCommands<'a, 'd> {
         self.uart.flush().unwrap();
         self.delay.delay_millis(500);
         log::info!("Wrote command");
+        let response = self.read_response();
+        log::info!("Response: {}", response);
+    }
+
+    fn read_response(&mut self) -> String {
         let mut buffer = [0u8; 1024];
-        let length = self.uart.read(&mut buffer).unwrap();
+
-        log::info!("text: {:?}", str::from_utf8(&buffer[..length]));
+        let mut contents = String::new();
+
+        while {
+            let parts: Vec<&str> = contents.split("\r\n").collect();
+            !RESPONSES.iter().any(|r| parts.contains(r))
+        } {
+            let length = self.uart.read(&mut buffer).unwrap();
+            contents += str::from_utf8(&buffer[..length]).unwrap();
+        }
+
+        let parts: Vec<&str> = contents.split("\r\n").collect();
+        let (idx, _) = parts
+            .iter()
+            .enumerate()
+            .find(|(_, part)| RESPONSES.contains(part))
+            .unwrap();
+        parts
+            .into_iter()
+            .take(idx + 1)
+            .collect::<Vec<_>>()
+            .join("\n")
     }
 }