Try to increment files for telemetry

Raspberry doesn't have access to internet and so can't NTP itself. Thus
it stays at the same time at each reboot making the telemetry recording
overwrite eachother.

Cargo.toml

@@ -32,7 +32,7 @@ plotters = {version = "0.2.12", default_features = false, features = ["image_enc
 conrod_glium = "0.69"
 conrod_winit = "0.69"
 conrod_core = "0.69"
-makair-telemetry = { git = "https://github.com/makers-for-life/makair-telemetry", features = ["env_logger"], rev = "dc21d8165061d60522da27c95adcc7cba7a84a94" }
+makair-telemetry = { git = "https://github.com/makers-for-life/makair-telemetry", features = ["env_logger"], rev = "aa08cc7814cc4076f653951900e34c7d76cf814f" }
 rn2903 = { git = "https://github.com/waxzce/lora-rust-rn2903-rn2483.git", rev = "b086057ba096920abef3870ad0cefa2c80a343e2", optional = true }
 sysfs_gpio = { version = "0.5", optional = true }
 

src/display/drawer.rs

@@ -135,10 +135,13 @@ impl<'a> DisplayDrawer<'a> {
         match &APP_ARGS.mode {
             crate::Mode::Port { port, output_dir } => {
                 let optional_file_buffer = output_dir.as_ref().map(|dir| {
+                    let file_count: Vec<std::io::Result<std::fs::DirEntry>> =
+                        std::fs::read_dir(dir).expect("Should read dir").collect();
                     let path = format!(
-                        "{}/{}.record",
+                        "{}/{}-{}.record",
                         &dir,
-                        chrono::Local::now().format("%Y%m%d-%H%M%S")
+                        chrono::Local::now().format("%Y%m%d-%H%M%S"),
+                        file_count.len() + 1
                     );
                     let file = std::fs::File::create(&path)
                         .unwrap_or_else(|_| panic!("could not create file '{}'", &path));