From 7ece72b39a003c9793a77628e93235964c8cfd57 Mon Sep 17 00:00:00 2001
From: dakkar <dakkar@thenautilus.net>
Date: Sat, 2 Apr 2022 12:46:36 +0100
Subject: simple serial command protocol

tagged responses, just because
---
 battery.h |  4 ++++
 co2.h     | 38 ++++++++++++++++++++++++++++++++++++++
 datalog.h | 22 ++++++++++++++++++++++
 display.h |  4 ++++
 main.ino  | 26 ++++++++++++++++++++++++++
 pm.h      |  4 ++++
 6 files changed, 98 insertions(+)

diff --git a/battery.h b/battery.h
index 9843241..d86fbec 100644
--- a/battery.h
+++ b/battery.h
@@ -46,4 +46,8 @@ public:
   void read(SensorData *data) {
     data->batteryVoltage = voltage();
   }
+
+  bool serialCommand(const String &tag, const String &command) {
+    return false;
+  }
 };
diff --git a/co2.h b/co2.h
index f75c94c..a6a1480 100644
--- a/co2.h
+++ b/co2.h
@@ -72,4 +72,42 @@ public:
         Serial.println(errorMessage);
     }
   }
+
+  bool serialCommand(const String &tag, const String &command) {
+    if (command.startsWith("setco ")) {
+      uint16_t error;
+      char errorMessage[256];
+
+      uint16_t target = command.substring(6).toInt();
+      uint16_t correction;
+
+      scd4x.stopPeriodicMeasurement();
+      delay(500);
+      error = scd4x.performForcedRecalibration(target, correction);
+      if (error) {
+        Serial.print("! CO2 performForcedRecalibration() error: ");
+        errorToString(error, errorMessage, 256);
+        Serial.println(errorMessage);
+      }
+
+      Serial.print(tag);Serial.print(" setco ");
+      if (correction == 0xFFFF) {
+        Serial.println("failed");
+      }
+      else {
+        Serial.println(correction - 0x8000);
+      }
+
+      error = scd4x.startLowPowerPeriodicMeasurement();
+      if (error) {
+        Serial.print("! CO2 startLowPowerPeriodicMeasurement() error: ");
+        errorToString(error, errorMessage, 256);
+        Serial.println(errorMessage);
+      }
+
+      return true;
+    }
+
+    return false;
+  }
 };
diff --git a/datalog.h b/datalog.h
index 96a3dfd..8f7bd81 100644
--- a/datalog.h
+++ b/datalog.h
@@ -68,4 +68,26 @@ public:
       Serial.println("# flushed");
     }
   }
+
+  bool serialCommand(const String &tag, const String &command) {
+    if (command == "log") {
+      Serial.print(tag);Serial.println(" begin");
+
+      uint8_t buffer[1024];
+      logfile.flush();
+      int remaining = logfile.position();
+      logfile.seek(0);
+      while (remaining > 0) {
+        int bytesRead = logfile.read(buffer, 1024);
+        Serial.write(buffer, bytesRead);
+        remaining -= bytesRead;
+      }
+
+      Serial.print(tag);Serial.println(" end");
+
+      return true;
+    }
+
+    return false;
+  }
 };
diff --git a/display.h b/display.h
index b6dd433..7a60317 100644
--- a/display.h
+++ b/display.h
@@ -107,4 +107,8 @@ public:
 
     display.powerDown();
   }
+
+  bool serialCommand(const String &tag, const String &command) {
+    return false;
+  }
 };
diff --git a/main.ino b/main.ino
index 1963870..4eb35cc 100644
--- a/main.ino
+++ b/main.ino
@@ -17,6 +17,25 @@ SensorData data;
 Display display;
 DataLog datalog;
 
+void handleCommand(const String &line) {
+  int firstSpace = line.indexOf(' ');
+  if (firstSpace < 0) return;
+
+  String tag = line.substring(0,firstSpace);
+  String command = line.substring(firstSpace+1);
+  tag.trim();command.trim();
+
+  Serial.print("# <");Serial.print(tag);
+  Serial.print("|");Serial.print(command);
+  Serial.println(">");
+
+  if (battery.serialCommand(tag,command)) return;
+  if (pm.serialCommand(tag,command)) return;
+  if (co2.serialCommand(tag,command)) return;
+  if (display.serialCommand(tag,command)) return;
+  if (datalog.serialCommand(tag,command)) return;
+}
+
 void setup() {
   Serial.begin(115200);
   while (!Serial) {
@@ -51,5 +70,12 @@ void loop() {
     datalog.show(&data);
   }
 
+  if (Serial.available()) {
+    Serial.println("# reading");
+    String line = Serial.readStringUntil('\n');
+    Serial.print("# ");Serial.println(line);
+    handleCommand(line);
+  }
+
   delay(5000);
 }
diff --git a/pm.h b/pm.h
index 7ac2050..116c74b 100644
--- a/pm.h
+++ b/pm.h
@@ -102,4 +102,8 @@ public:
     sps30_sleep();
     awake=false;
   }
+
+  bool serialCommand(const String &tag, const String &command) {
+    return false;
+  }
 };
-- 
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