[IN1892] fix: return basic stats instead of null on LTE without signal

Response on LTE without signal will now be:

{
   "datetime" : "01/06/80 00:01:31 GMT+5",
   "roaming" : false,
   "rssi" : 99,
   "service" : "Unknown"
}

instead of null

1 files changed, 10 insertions, 0 deletions

diff --git a/src/MTS_IO_CellularRadio.cpp b/src/MTS_IO_CellularRadio.cpp
index c5b503d..cb1a59c 100644
--- a/src/MTS_IO_CellularRadio.cpp
+++ b/src/MTS_IO_CellularRadio.cpp
@@ -959,6 +959,16 @@ CellularRadio::CODE CellularRadio::getNetworkStatus(Json::Value& jData) {
     sResult = sendCommand(sCmd, DEFAULT_BAIL_STRINGS, 200);
     if (sResult.find("#RFSTS:") == std::string::npos) {
         printDebug("%s| Network Status command returned unexpected response: [%s][%s]", m_sName.c_str(), sCmd.c_str(), sResult.c_str());
+
+        if (sResult.find(CellularRadio::RSP_OK) < 3) {
+            //Command returns only "OK". Actual response is usually "\r\nOK", so check index < 3
+            //This will happen when LTE radios don't have a signal
+            //Since AT#RFSTS failed, just get common network stats and return
+            //This will update RSSI which'll show that signal is gone
+            getCommonNetworkStats(jData);
+            printTrace("%s| Network Status:\n%s\n", m_sName.c_str(), jData.toStyledString().c_str());
+            return SUCCESS;
+        }
         return FAILURE;
     }