#include "credentials.h"

[dkcsn]

This seems really interesting - and thank you for sharing this great work Would it be possible to share the template of credentials.h?

[chester4444]

Replace your Wifi setting(s), your meter AESkey and the meter serial number

// defines for the credentials
#define SSID1   "ssid1"
#define PW1     "pass1"
#define MQTT1   "10.0.0.100"
#define SSID2   "ssid2"
#define PW2     "pass2"
#define MQTT2   "10.0.0.100"
#define SSID3   "IoT"
#define PW3     "pass3"
#define MQTT3   "10.14.0.1"
#define W_ENCRYPTION_KEY      0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff
#define W_SERIAL_NUMBER       0x12, 0x34, 0x056, 0x78

[dkcsn]

Thank you :-)

I never used platform.io, only arduino ide. I might be the way this i packed. But i have issues compiling this.

In file included from sketch/WMbusFrame.h:5:0, from sketch/WMBusFrame.cpp:15: /Users/christian_nielsen/Library/Arduino15/packages/esp8266/hardware/esp8266/2.7.1/cores/esp8266/Crypto.h:749:5: error: 'br_hkdf_context' in namespace '::' does not name a type ::br_hkdf_context hkdfContext; ^ In file included from sketch/WMBusFrame.h:5:0, from sketch/WaterMeter.h:20, from sketch/WaterMeter.cpp:15: /Users/christian_nielsen/Library/Arduino15/packages/esp8266/hardware/esp8266/2.7.1/cores/esp8266/Crypto.h:749:5: error: 'br_hkdf_context' in namespace '::' does not name a type ::br_hkdf_context hkdfContext; ^ exit status 1 Error compiling for board LOLIN(WEMOS) D1 mini Lite.

[dkcsn]

I found out - the code is compatible for ESP8266 up to version 2.6.3 - version 2.7.0 and up fails compiling. so you need to choose maximum 2.6.3 in https://arduino.esp8266.com/stable/package_esp8266com_index.json with that said - amazing work

[dkcsn]

__

Replace your Wifi setting(s), your meter AESkey and the meter serial number

// defines for the credentials
#define SSID1   "ssid1"
#define PW1     "pass1"
#define MQTT1   "10.0.0.100"
#define SSID2   "ssid2"
#define PW2     "pass2"
#define MQTT2   "10.0.0.100"
#define SSID3   "IoT"
#define PW3     "pass3"
#define MQTT3   "10.14.0.1"
#define W_ENCRYPTION_KEY      0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff
#define W_SERIAL_NUMBER       0x12, 0x34, 0x056, 0x78

Thank you for providing this 🤟 - wondering why you can/shall define wifi/PW/MQTT three times ?

[chester4444]

Im using PlatformIO und i am still at 2.6.3 - thanks for the hint. 3 Wifis? it was easier with them in the development phase.

[dkcsn]

Today I recieved my KEM files to the Kamstrup Multical 21, it took a little time to find out how to decrypt and get the DEK key (W_ENCRYPTION_KEY) exported. Still waiting for the CC1101 module :-) I should arrive shortly. Wondering if I can use a Username and Password for the MQTT server - i looks like U/P is for wifi only?

[chester4444]

to connect to the mqtt-server with user/password, change https://github.com/chester4444/esp-multical21/blob/f6841f9f4770733a32cedc598a8f902f6fdbc16d/src/main.cpp#L187 to return mqttClient.connect(ESP_NAME, "mqtt-user", "mqtt-password", "/watermeter/online", 0, true, "False");

[dkcsn]

Thank. you .- this works great :-)

[atifan]

Hello. How can i set the port for mqtt-server?

[atifan]

@dkcsn : Can u tell my how u did export the DEK ? I am waiting for my key from waterworks. Where did you get the serial number? From the device? In my case the S/N looks like 12345678/TR/20 -> how did you convert that in hex or what, for the credentials.ini ?