fix display of PacketUp

Cargo.toml

@@ -50,6 +50,7 @@ tokio = { version = "1", default-features = false, features = [
 ] }
 tokio-stream = { version = "0", default-features = false }
 futures = "*"
+rust_decimal = { workspace = true }
 triggered = "0.1"
 tracing = "0"
 tracing-subscriber = { version = "0", default-features = false, features = [

src/packet.rs

@@ -50,10 +50,21 @@ impl From<PacketRouterPacketDownV1> for PacketDown {
 
 impl fmt::Display for PacketUp {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        use rust_decimal::Decimal;
+        // format the frequency to appropriate units
+        let (mut frequency, f_units) = if self.frequency >= 1_000_000 {
+            (Decimal::new(self.frequency.into(), 6), "MHz")
+        } else if self.frequency >= 1_000 {
+            (Decimal::new(self.frequency.into(), 3), "kHz")
+        } else {
+            (Decimal::new(self.frequency.into(), 0), "Hz")
+        };
+        frequency.normalize_assign();
         f.write_fmt(format_args!(
-            "@{} us, {:.2} MHz, {:?}, snr: {}, rssi: {}, len: {}",
+            "@{} us, {} {}, {:?}, snr: {}, rssi: {}, len: {}",
             self.0.timestamp,
-            self.0.frequency,
+            frequency,
+            f_units,
             self.0.datarate(),
             self.0.snr,
             self.0.rssi,