From 4b74c71f19d7bb9209cd7aeebff7ef253d3f9000 Mon Sep 17 00:00:00 2001
From: UBWH <72185209+UBWH@users.noreply.github.com>
Date: Tue, 22 Jul 2025 15:20:02 +0800
Subject: [PATCH] Create D20.be (#23709)

---
 .../lorawan/decoders/vendors/dragino/D20.be   | 122 ++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 tasmota/berry/lorawan/decoders/vendors/dragino/D20.be

diff --git a/tasmota/berry/lorawan/decoders/vendors/dragino/D20.be b/tasmota/berry/lorawan/decoders/vendors/dragino/D20.be
new file mode 100644
index 000000000..13de30686
--- /dev/null
+++ b/tasmota/berry/lorawan/decoders/vendors/dragino/D20.be
@@ -0,0 +1,122 @@
+# LoRaWAN Decoder file for Dragino D20/D22/D23 (1,2,3 temp sensor models)
+#
+# References
+#  User Manual:     https://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual/
+#  TTN Device Repository: https://github.com/TheThingsNetwork/lorawan-devices/blob/master/vendor/dragino/d2x-lb.js
+
+import string
+
+global.DrgD20Nodes = {}
+
+class LwDecoDrgD20
+  static def decodeUplink(Node, RSSI, FPort, Bytes)
+    var data = {"Device":"Dragino D20"}
+    data.insert("Node", Node)
+
+    var valid_values = false
+    var last_seen = 1451602800
+    var battery_last_seen = 1451602800
+    var battery = 1000
+    var rssi = RSSI
+    var tempC1 = 1000
+    var tempC2 = 1000
+	var tempC3 = 1000
+	
+    if global.DrgD20Nodes.find(Node)
+      last_seen = global.DrgD20Nodes.item(Node)[1]
+      battery_last_seen = global.DrgD20Nodes.item(Node)[2]
+      battery = global.DrgD20Nodes.item(Node)[3]
+      rssi = global.DrgD20Nodes.item(Node)[4]
+      tempC1 = global.DrgD20Nodes.item(Node)[5]
+	    tempC2 = global.DrgD20Nodes.item(Node)[6]										
+      tempC3 = global.DrgD20Nodes.item(Node)[7]
+    end
+
+    ## SENSOR DATA ##
+    if 2 == FPort && Bytes.size() == 11
+      last_seen = tasmota.rtc('local')
+	  
+	  var mode=(Bytes[6] & 0x7C)>>2
+      if 3==mode
+	    battery = (Bytes[0]<<8 | Bytes[1])/1000	
+		
+		    # 0x07FF = 2047 =  no temp sensor 
+		
+        tempC1 = Bytes[2] << 8 | Bytes[3]
+        if Bytes[2]>0x7F tempC1-=0x10000 end
+		    tempC1 /= 10.0
+        data.insert("TempC1", tempC1)
+
+        tempC2 = Bytes[7] << 8 | Bytes[8]
+        if Bytes[7]>0x7F tempC2-=0x10000 end
+		    tempC2 /= 10.0
+        data.insert("TempC2", tempC2)
+
+        tempC3 = Bytes[9] << 8 | Bytes[10]
+        if Bytes[9]>0x7F tempC3-=0x10000 end
+		    tempC3 /= 10.0
+        data.insert("TempC3", tempC3)
+		
+	  end
+	  
+      valid_values = true
+
+    ## STATUS DATA ##
+    elif 5 == FPort && Bytes.size() == 7
+      data.insert("Sensor_Model",Bytes[0])
+      data.insert("Firmware_Version", f'v{Bytes[1]:%u}.{Bytes[2]>>4:%u}.{Bytes[2]&0xF:%u}')
+      data.insert("Freq_Band",LwRegions[Bytes[3]-1])
+      data.insert("Sub_Band",Bytes[4])
+      data.insert("BattV",((Bytes[5] << 8) | Bytes[6]) / 1000.0)
+      battery_last_seen = tasmota.rtc('local')
+      battery = ((Bytes[5] << 8) | Bytes[6]) / 1000.0
+      valid_values = true
+    else
+    # Ignore other Fports
+    end #Fport
+
+    if valid_values
+      if global.DrgD20Nodes.find(Node)
+        global.DrgD20Nodes.remove(Node)
+      end
+      #                         sensor[0]    [1]        [2]                [3]      [4]   [5]     [6]     [7]
+      global.DrgD20Nodes.insert(Node, [Node, last_seen, battery_last_seen, battery, RSSI, tempC1, tempC2, tempC3])   
+    end
+
+    return data
+  end #decodeUplink()
+
+  static def add_web_sensor()
+    var msg = ""
+    for sensor: global.DrgD20Nodes
+      var name = string.format("D20-%i", sensor[0])
+      var name_tooltip = "Dragino D20"
+      var battery = sensor[3]
+      var battery_last_seen = sensor[2]
+      var rssi = sensor[4]
+      var last_seen = sensor[1]
+      msg += lwdecode.header(name, name_tooltip, battery, battery_last_seen, rssi, last_seen)
+
+      # Sensors
+      var tempC1 = sensor[5]
+      msg += "<tr class='htr'><td colspan='4'>&#9478;"                   # |
+      if tempC1 < 1000
+        msg += string.format(" &#x2600;&#xFE0F; %.1f°C", tempC1)         # Sunshine - Temperature 
+      end
+
+      var tempC2 = sensor[6]
+      if tempC2 < 1000
+        msg += string.format(" &#x2600;&#xFE0F; %.1f°C", tempC2)         
+      end
+
+      var tempC3 = sensor[7]
+      if tempC3 < 1000
+        msg += string.format(" &#x2600;&#xFE0F; %.1f°C", tempC3)         
+      end
+      msg += "{e}"                                                       # = </td></tr>
+    end
+    return msg
+  end #add_web_sensor()
+end #class
+
+LwDeco = LwDecoDrgD20