[MTS-MTQ] QuectelRadio implementation

Moved Telit-specific conversion between RSSI and dBm into the TelitRadio class.

Quectel has MOSTLY the same conversion logic but in the case of TD-SCDMA
the RSSI values may be uncompatible.

1 files changed, 41 insertions, 0 deletions

diff --git a/src/MTS_IO_TelitRadio.cpp b/src/MTS_IO_TelitRadio.cpp
index 7f9de63..bfcb42e 100644
--- a/src/MTS_IO_TelitRadio.cpp
+++ b/src/MTS_IO_TelitRadio.cpp
@@ -449,6 +449,47 @@ std::string TelitRadio::queryCGREGstring() {
     return cmdResult;
 }
 
+CellularRadio::CODE TelitRadio::convertSignalStrengthTodBm(const int32_t& iRssi, int32_t& iDbm) {
+
+    //Telit Conversion
+    if(iRssi < 0 || iRssi == 99) {
+        return FAILURE;
+    }
+
+    if(iRssi == 0) {
+        iDbm = -113;
+    } else if(iRssi == 1) {
+        iDbm = -111;
+    } else if(iRssi <= 30) {
+        //28 steps between 2 and 30
+        //54 dbm between 53 and 109
+        float stepSize = 54.0 / 28.0;
+        iDbm = -109 + (int)(stepSize * (iRssi-2));
+    } else {
+        iDbm = -51;
+    }
+
+    return SUCCESS;
+}
+
+CellularRadio::CODE TelitRadio::convertdBmToSignalStrength(const int32_t& iDBm, int32_t& iRssi) {
+    //Telit Conversion
+    if(iDBm <= -113) {
+        iRssi = 0;
+    } else if(iDBm <= -111) {
+        iRssi = 1;
+    } else if(iDBm <= -53) {
+        //54 dbm between -109 and -53
+        //28 steps between 2 and 30
+        float stepSize = 28.0/54.0;
+        iRssi = ((iDBm + 109)*stepSize) + 2;
+    } else {
+        iRssi = 31;
+    }
+
+    return SUCCESS;
+}
+
 CellularRadio::CODE TelitRadio::setMdn(const Json::Value& jArgs) {
     printTrace("%s| Set MDN", getName().c_str());