From 76c102c09c4b7532e56b22fd1380a50f9bf942fc Mon Sep 17 00:00:00 2001
From: Erik <erik@montnemery.com>
Date: Fri, 27 Jul 2018 12:17:34 +0200
Subject: [PATCH] Support send / receive of binary serial data

---
 sonoff/settings.h   |  2 +-
 sonoff/settings.ino |  4 ++--
 sonoff/sonoff.ino   | 27 ++++++++++++++++++++-------
 3 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/sonoff/settings.h b/sonoff/settings.h
index e527d74b7..9abfa9fb9 100644
--- a/sonoff/settings.h
+++ b/sonoff/settings.h
@@ -48,7 +48,7 @@ typedef union {                            // Restricted by MISRA-C Rule 18.4 bu
     uint32_t not_power_linked : 1;         // bit 20 (v5.11.1f)
     uint32_t no_power_on_check : 1;        // bit 21 (v5.11.1i)
     uint32_t mqtt_serial : 1;              // bit 22 (v5.12.0f)
-    uint32_t rules_enabled : 1;            // bit 23 (v5.12.0j) - free since v5.14.0b
+    uint32_t mqtt_serial_raw : 1;          // bit 23 (vTDB)
     uint32_t rules_once : 1;               // bit 24 (v5.12.0k) - free since v5.14.0b
     uint32_t knx_enabled : 1;              // bit 25 (v5.12.0l) KNX
     uint32_t device_index_enable : 1;      // bit 26 (v5.13.1a)
diff --git a/sonoff/settings.ino b/sonoff/settings.ino
index d5541298d..10fbd10ed 100644
--- a/sonoff/settings.ino
+++ b/sonoff/settings.ino
@@ -756,7 +756,7 @@ void SettingsDelta()
     }
     if (Settings.version < 0x050E0002) {
       for (byte i = 1; i < MAX_RULE_SETS; i++) { Settings.rules[i][0] = '\0'; }
-      Settings.rule_enabled = Settings.flag.rules_enabled;
+      Settings.rule_enabled = Settings.flag.mqtt_serial_raw;
       Settings.rule_once = Settings.flag.rules_once;
     }
     if (Settings.version < 0x06000000) {
@@ -778,7 +778,7 @@ void SettingsDelta()
       }
     }
     if (Settings.version < 0x06000003) {
-      Settings.flag.rules_enabled = 0;
+      Settings.flag.mqtt_serial_raw = 0;
       Settings.flag.rules_once = 0;
       Settings.flag3.data = 0;
     }
diff --git a/sonoff/sonoff.ino b/sonoff/sonoff.ino
index 7b63160fb..a302d65fe 100755
--- a/sonoff/sonoff.ino
+++ b/sonoff/sonoff.ino
@@ -915,15 +915,19 @@ void MqttDataHandler(char* topic, byte* data, unsigned int data_len)
       }
       snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_NVALUE, command, Settings.baudrate * 1200);
     }
-    else if ((CMND_SERIALSEND == command_code) && (index > 0) && (index <= 3)) {
+    else if ((CMND_SERIALSEND == command_code) && (index > 0) && (index <= 4)) {
       SetSeriallog(LOG_LEVEL_NONE);
       Settings.flag.mqtt_serial = 1;
+      Settings.flag.mqtt_serial_raw = (4 == index)?1:0;
       if (data_len > 0) {
         if (1 == index) {
           Serial.printf("%s\n", dataBuf);
         }
-        else if (2 == index) {
-          Serial.printf("%s", dataBuf);
+        else if (2 == index || 4 == index) {
+          for (int i=0; i<data_len; i++)
+          {
+            Serial.write(dataBuf[i]);
+          }
         }
         else if (3 == index) {
           uint16_t dat_len = data_len;
@@ -2176,7 +2180,7 @@ void SerialInput()
 #endif  // USE_ENERGY_SENSOR
 /*-------------------------------------------------------------------------------------------*/
 
-    if (serial_in_byte > 127) {                // binary data...
+    if (serial_in_byte > 127 && !Settings.flag.mqtt_serial_raw) { // binary data...
       serial_in_byte_counter = 0;
       Serial.flush();
       return;
@@ -2190,8 +2194,9 @@ void SerialInput()
         }
       }
     } else {
-      if (serial_in_byte) {
-        if ((serial_in_byte_counter < INPUT_BUFFER_SIZE -1) && (serial_in_byte != Settings.serial_delimiter)) {  // add char to string if it still fits
+      if (serial_in_byte || Settings.flag.mqtt_serial_raw) {
+        if ((serial_in_byte_counter < INPUT_BUFFER_SIZE -1) &&
+            ((serial_in_byte != Settings.serial_delimiter) || Settings.flag.mqtt_serial_raw)) {  // add char to string if it still fits
           serial_in_buffer[serial_in_byte_counter++] = serial_in_byte;
           serial_polling_window = millis();
         } else {
@@ -2231,7 +2236,15 @@ void SerialInput()
 
   if (Settings.flag.mqtt_serial && serial_in_byte_counter && (millis() > (serial_polling_window + SERIAL_POLLING))) {
     serial_in_buffer[serial_in_byte_counter] = 0;  // serial data completed
-    snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_JSON_SERIALRECEIVED "\":\"%s\"}"), serial_in_buffer);
+    if (!Settings.flag.mqtt_serial_raw) {
+      snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_JSON_SERIALRECEIVED "\":\"%s\"}"), serial_in_buffer);
+    } else {
+      snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_JSON_SERIALRECEIVED "\":\""));
+      for (int i=0; i<serial_in_byte_counter; i++) {
+        snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s%02x"), mqtt_data, serial_in_buffer[i]);
+      }
+      snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s\"}"), mqtt_data);
+    }
     MqttPublishPrefixTopic_P(RESULT_OR_TELE, PSTR(D_JSON_SERIALRECEIVED));
 //    XdrvRulesProcess();
     serial_in_byte_counter = 0;