MQTT

IoT Protocol, Modbus

2021-02-20. Category & Tags: IoT, Modbus, RS232, RS485, Serial, COM, CAN1939, MQTT, Emulator, Simulator

Modbus Protocol # 一文看懂 Modbus 协议 Complete Modbus Guide. a good intro to Modbus. nice intro to Modbus and Modbus Enron. ref Serial Port/Line/Connection Simulator/Emulator # Note: Setup / Use (Write & Read) Linux serial ports require root permission com0com / Null-modem emulator (windows, free) [suggested for win] # serial line/connections a kernel-mode virtual serial port driver for Windows. download from sourceforge free virtual serial ports (windows, free & commercial) # serial line/connections free version limit: port not permanent commercial version: support remote virtual paired ports (based on samba? ...

MQTT

2021-02-20. Category & Tags: MQTT, IoT

Server example: Apache ActiveMq (ref, bak). activemq-admin.bat create mybroker cd mybroker/bin/ mybroker.bat start http://127.0.0.1:8161/ Client: MQTTX, Chrome MQTTBox, etc. See more servers/clients/tools/libs here: HiveMq