Update code to ArduinoJSON 6

https://docs.platformio.org/en/latest/ci/gitlab.html#integration

.gitlab-ci.yml

@@ -1,12 +1,19 @@
-build:
-  image: eclipse/platformio
+image: python:2.7
+
+stages:
+ - test
+
+before_script:
+  - "pip install -U platformio"
+
+job:
+  stage: test
   script:
-#    - platformio lib -g install 1
-#    - platformio ci --board=esp32thing
-    - platformio run
-    - cp /home/user/.platformio/packages/framework-arduinoespressif32/tools/sdk/bin/bootloader.bin .pioenvs/esp32thing/
-    - cp /home/user/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin .pioenvs/esp32thing/
-# to flash: esptool.py --before default_reset --after hard_reset --chip esp32 --port "/dev/ttyUSB0" --baud 115200 write_flash -z --flash_mode dio --flash_freq 80m --flash_size 4MB 0x1000 "/home/user/.platformio/packages/framework-arduinoespressif32/tools/sdk/bin/bootloader.bin" 0x8000 ".pioenvs/esp32thing/partitions.bin" 0xe000 "/home/user/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin" 0x10000 .pioenvs/esp32thing/firmware.bin
+    - platformio ci --project-conf platformio.ini --board=heltec_wifi_lora_32
+    - cp /home/user/.platformio/packages/framework-arduinoespressif32/tools/sdk/bin/bootloader.bin .pioenvs/heltec_wifi_lora_32/
+    - cp /home/user/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin .pioenvs/heltec_wifi_lora_32/
+# to flash: esptool.py --before default_reset --after hard_reset --chip esp32 --port "/dev/ttyUSB0" --baud 115200 write_flash -z --flash_mode dio --flash_freq 80m --flash_size 4MB 0x1000 "/home/user/.platformio/packages/framework-arduinoespressif32/tools/sdk/bin/bootloader.bin" 0x8000 ".pioenvs/esp32thing/partitions.bin" 0xe000 "/home/user/.platformio/packages/framework-arduinoespressif32/tools/partitions/boot_app0.bin" 0x10000 .pioenvs/heltec_wifi_lora_32/firmware.bin
+  variables: {PLATFORMIO_CI_SRC: "src"}
   artifacts:
     paths:
-      - ".pioenvs/esp32thing/*.bin"
+      - ".pioenvs/heltec_wifi_lora_32/*.bin"

src/AlarmClock.h

@@ -5,7 +5,7 @@
 
 #include <time.h>
 #include <sys/time.h>
-#include "apps/sntp/sntp.h"
+#include "lwip/apps/sntp.h"
 
 #include "driver/rtc_io.h"
 

src/main.cpp

@@ -264,28 +264,26 @@ void transmitStatus() {
     pres = bme280.readPressure();
   }
 
-  StaticJsonBuffer<200> jsonBuffer;
-  JsonObject& root = jsonBuffer.createObject();
+  StaticJsonDocument<200> jsonDocument;
   if (bme280.valid) {
-    root["temperature"] = temp;
-    root["humidity"] = humi;
-    root["pressure"] = pres;
+    jsonDocument["temperature"] = temp;
+    jsonDocument["humidity"] = humi;
+    jsonDocument["pressure"] = pres;
   } else {
-    //root["temperature"] = internal_temp;
+    //jsonDocument["temperature"] = internal_temp;
   }
 
-  char weatherBuf[root.measureLength()+1];
-  root.printTo(weatherBuf, sizeof(weatherBuf));
+  char weatherBuf[measureJson(jsonDocument)+1];
+  serialize(jsonDocument, weatherBuf, sizeof(weatherBuf));
   uint16_t statusPacketIdSub;
   statusPacketIdSub = iot.mqtt.publish(weatherTopic.c_str(), 0, false, weatherBuf);
 
-  StaticJsonBuffer<200> jsonBuffer2;
-  JsonObject& root2 = jsonBuffer2.createObject();
-  root2["voltage"] = rom_phy_get_vdd33();
-  root2["rssi"] = WiFi.RSSI();
-  root2["heap"] = ESP.getFreeHeap();
-  char statusBuf[root2.measureLength()+1];
-  root2.printTo(statusBuf, sizeof(statusBuf));
+  StaticJsonDocument<200> jsonDocument2;
+  jsonDocument2["voltage"] = rom_phy_get_vdd33();
+  jsonDocument2["rssi"] = WiFi.RSSI();
+  jsonDocument2["heap"] = ESP.getFreeHeap();
+  char statusBuf[measureJson(jsonDocument2)+1];
+  serialize(jsonDocument2, statusBuf, sizeof(statusBuf));
   statusPacketIdSub = iot.mqtt.publish(statusTopic.c_str(), 0, false, statusBuf);
 }