From 28c9c681538308e126131f4b65ec2e793398cbd4 Mon Sep 17 00:00:00 2001
From: K <luca@pretto.eu>
Date: Thu, 20 Jul 2023 10:24:10 +0200
Subject: [PATCH] [ADD] 2023 barani meteo wind codec

---
 .gitignore                |   3 +-
 barani-meteo-wind-2023.js | 122 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 124 insertions(+), 1 deletion(-)
 create mode 100644 barani-meteo-wind-2023.js

diff --git a/.gitignore b/.gitignore
index 723ef36..706fd07 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-.idea
\ No newline at end of file
+.idea
+.vscode
diff --git a/barani-meteo-wind-2023.js b/barani-meteo-wind-2023.js
new file mode 100644
index 0000000..7a66838
--- /dev/null
+++ b/barani-meteo-wind-2023.js
@@ -0,0 +1,122 @@
+var pos = 0;
+var bindata = "";
+
+var ConvertBase = function (num) {
+    return {
+        from : function (baseFrom) {
+            return {
+                to : function (baseTo) {
+                    return parseInt(num, baseFrom).toString(baseTo);
+                }
+            };
+        }
+    };
+};
+
+function pad(num) {
+    var s = "0000000" + num;
+    return s.slice(-8);
+}
+
+function windify(num) {
+    if (num > 0) {
+        return num * 0.6335 + 0.3582
+    } else {
+        return 0
+    }
+    
+  }
+
+ConvertBase.dec2bin = function (num) {
+    return pad(ConvertBase(num).from(10).to(2));
+};
+
+ConvertBase.bin2dec = function (num) {
+    return ConvertBase(num).from(2).to(10);
+};
+
+function data2bits(data) {
+    var binary = "";
+    for(var i=0; i<data.length; i++) {
+        binary += ConvertBase.dec2bin(data[i]);
+    }
+    return binary;
+}
+
+function bitShift(bits) {
+    var num = ConvertBase.bin2dec(bindata.substr(pos, bits));
+    pos += bits;
+    return Number(num);
+}
+
+function precisionRound(number, precision) {
+  var factor = Math.pow(10, precision);
+  return Math.round(number * factor) / factor;
+}
+
+function Decoder(fPort, bytes, variables) {
+  bindata = data2bits(bytes);
+
+  if(bytes.length != 12) return {"status": "ERROR", "description": "12 bytes are required"};
+
+    Index = bitShift(8)*1;
+
+    if ((Index % 10) <= 4) {
+      bitShift(1); // is 9th bit useless?
+      Battery = (Index % 10) * 0.2 + 3.3;
+    } else {
+      bitShift(1); // is 9th bit useless?
+      Battery = (Index % 10) * 0.2 + 3.3 - 1;
+    }
+
+    Hz_avg = bitShift(12) * 0.02
+    Wind_10m_avg = precisionRound(windify(Hz_avg), 2);
+
+    Hz_3s_gust = bitShift(9) * 0.1 + Hz_avg
+    Wind_3s_gust = precisionRound(windify(Hz_3s_gust), 1);
+
+    Hz_1s_gust = bitShift(8) * 0.1 + Hz_3s_gust;
+    Wind_1s_gust = precisionRound(windify(Hz_1s_gust), 1);
+
+    Hz_3s_min = bitShift(9) * 0.1
+    Wind_3s_min = precisionRound(windify(Hz_3s_min), 1);
+
+    Wind_stdev = precisionRound(bitShift(8) * 0.1, 1);
+
+    Dir_10m_avg = bitShift(9);
+
+    Dir_1s_gust = bitShift(9);
+
+    Dir_stdev = bitShift(8);
+
+    Duration_gust = bitShift(7) * 5;
+
+    Alarm_sent = bitShift(1);
+
+    Debug_flags = bitShift(1);
+
+    decoded = {
+    "Index": Index,
+    "Battery": Battery,
+    "Wind_10m_avg": Wind_10m_avg,
+    "Wind_3s_gust": Wind_3s_gust,
+    "Wind_1s_gust": Wind_1s_gust,
+    "Wind_3s_min": Wind_3s_min,
+    "Wind_stdev": Wind_stdev,
+    "Dir_10m_avg": Dir_10m_avg,
+    "Dir_1s_gust": Dir_1s_gust,
+    "Dir_stdev": Dir_stdev,
+    "Duration_gust": Duration_gust,
+    "Alarm_sent": Alarm_sent,
+    "Debug_flags": Debug_flags,
+    };
+
+return decoded;
+
+}
+
+function decodeUplink(input) {
+        return {
+            data: Decoder(input.fPort, input.bytes, input.variables)
+        };
+}