diff --git a/lib/modem.js b/lib/modem.js
index 61b81b7..5307d8d 100644
--- a/lib/modem.js
+++ b/lib/modem.js
@@ -2,8 +2,7 @@
 
 const INTERVAL_BEETWEN_SIGNAL_STRENGTH_MS = 60000;
 const MAX_LAST_DATA_AGE_MS = 3 * 60 * 1000;
-// const REGEX_WAIT_FOR_OK_OR_ERROR = /\n(?:OK|ERROR)\r\n/;
-const REGEX_WAIT_FOR_OK_OR_ERROR = /(?:OK|ERROR)\r/;
+const REGEX_WAIT_FOR_OK_OR_ERROR = /\n(?:OK|ERROR)\r/;
 
 const moment = require('moment');
 const SerialPort = require('serialport');
@@ -294,7 +293,7 @@ async function sendSMS(destination, msg) {
     logger.verbose('Waiting for lock before writing message');
     await mutex.setLockWaitForSubCommand();
     port.pipe(parser);
-    await writeToPort(`AT+CMGS="${correctedDestination}"\n${msg}${Buffer.from([0x1A])}`);
+    await writeToPort(`AT+CMGS="${correctedDestination}"\r${msg}${Buffer.from([0x1A])}`);
 
     await mutex.setLockWaitForSubCommand();
     mutex.releaseLockWaitForSubCommand();