From d1d569dadfc06636390cceec1e18d29bc3d2ac58 Mon Sep 17 00:00:00 2001
From: cheetah <git@cheetah.cat>
Date: Sun, 13 Nov 2022 23:59:44 +0000
Subject: [PATCH] added birdy slim payloadformatter

---
 ttnv3.uplink.birdyslim.js | 125 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 ttnv3.uplink.birdyslim.js

diff --git a/ttnv3.uplink.birdyslim.js b/ttnv3.uplink.birdyslim.js
new file mode 100644
index 0000000..96b4e2e
--- /dev/null
+++ b/ttnv3.uplink.birdyslim.js
@@ -0,0 +1,125 @@
+function Decoder(bytes, port) {
+    var data = {}
+    function bytesToString(a) {
+      return a.map(function(x){ return String.fromCharCode(x) }).join('') // because very OLD js parser
+    }
+    switch (port) {
+      case 1: // Technical Received Acknowledgment '|5||C|'
+        // 31 32 33 34 35 20
+        data.type = 'ack'
+        data.ack = 'recv'
+        data.msgid = bytesToString(bytes.splice(0,5))
+        data.rssi = bytes[0]
+        break;
+      case 2: // Read and Operational Acknowledgment 'AA|5|' and Operational '33|5|<CustomByte(s)>'
+        // AA 31 32 33 34 35
+        // operational ack with Payload "test"(maybe you should use a single byte)
+        // 33  31 32 33 34 35  54 65 73 74
+        data.type = 'ack'
+        data.ack = bytes.length == 5 ? 'read' : 'operational'
+        data.msgid = bytesToString(bytes.splice(0,5))
+        if (data.ack === 'operational') {
+          data.operationalData = bytes
+        }
+        break;
+      case 3: // Status & Canned Messages
+        // Canned Message '01' --- '05', single Hex Number, incrementing
+        // Status '<StatusIncrID>|Z|' or if no CenterSelection '<StatusIncrID>00'
+        
+        if (bytes.length == 1) {
+          data.type = 'cannedMessage'
+          data.cannedMessage = bytes[0] * 1
+        } else {
+          data.type = 'status'
+          data.status = bytes[0] * 1
+          data.selection = bytes[1] * 1
+        }
+        break;
+      case 4: // Battery and Power Notifications
+        // Startup 'FF'
+        // Shutdown 'EE'
+        // Low Battery 'FD'
+        // ChargingOn '|V|CC'
+        // ChargingOff'|V|BB'
+        if (bytes.length == 1) {
+          data.type = 'power'
+          if (bytes[0] >= 0xEE) {
+            data.poweredOn =  bytes[0]== 0xFF
+          }
+          if (bytes[0] == 0xFD) {
+            data.type = 'low_battery'
+          }
+          if (bytes[0] <= 0xAA) {
+            data.type = 'battery'
+            data.battery = bytes[0] * 1
+            data.isCharging = false
+          }
+        } else {
+          data.type = 'battery'
+          data.battery = bytes[0] * 1
+          data.isCharging = bytes[1] == 0xCC
+        }
+        break;
+      case 5:  // OTAStatus + LoneWorker/SOS Trigger +  GPS Tracking Port '|G|'
+        // GPS Tracking '|G|'
+        //// 00 1E 33 D7 00 4A 2C 31 10
+        // SOS Start 'FF|G|'
+        //// FF 00 1E 33 D7 00 4A 2C 31 10
+        // SOS End 'FE|G|'
+        //// FE 00 1E 33 D7 00 4A 2C 31 10
+        // LoneWorker Lack of movement 'FD|G|'
+        //// FD 00 1E 33 D7 00 4A 2C 31 10
+        // LoneWorker Falldetect 'FC|G|'
+        //// FC 00 1E 33 D7 00 4A 2C 31 10
+        // LoneWorker End 'FB|G|'
+        //// FB 00 1E 33 D7 00 4A 2C 31 10
+        // OTA/PagerStatus 'FA|G||V|'
+        //// FA 00 1E 33 D7 00 4A 2C 31 10 28
+        if (bytes.length !== 9) { // we have more than just the |G| block
+          if (bytes.length === 10) {
+            switch(bytes[0]) {
+              case 0xFF: // SOS Start
+                data.type = 'sos'
+                data.sos = true
+              break;
+              case 0xFE: // SOS End
+                data.type = 'sos'
+                data.sos = false
+              break;
+              case 0xFD: // LoneWorker Lack of movement
+                data.type = 'sos'
+                data.sos = false
+                data.loneworker = 'lackofmovement'
+              break;
+              case 0xFC: // LoneWorker Falldetect
+                data.type = 'sos'
+                data.sos = false
+                data.loneworker = 'falldetect'
+              break;
+              case 0xFB: // LoneWorker End
+                data.type = 'sos'
+                data.sos = false
+                data.loneworker = false
+              break;
+            }
+            bytes.splice(0,1)
+          }
+          if (bytes.length === 11) { // OTA PagerStatus
+            data.type = 'ota'
+            data.ota = 'status'
+            data.battery = bytes[10] * 1
+            bytes.splice(0,1)
+          }
+        } else { // we are having a normal gps block only
+          data.type = 'gps'
+        }
+        var gpsBlock = bytes.splice(0,9)
+        data.longitude = ((gpsBlock[0]<<24)>>>0) + ((gpsBlock[1]<<16)>>>0) + ((gpsBlock[2]<<8)>>>0) + gpsBlock[3]
+        data.longitude /= 10e4
+        data.latitude = ((gpsBlock[4]<<24)>>>0) + ((gpsBlock[5]<<16)>>>0) + ((gpsBlock[6]<<8)>>>0) + gpsBlock[7]
+        data.latitude /= 10e4
+        data.lastGPSAcquisition = gpsBlock[8]
+        break;
+    }
+    return data;
+  }
\ No newline at end of file