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4G intelligent unmanned vehicle press forward, let go, stop and turn speed regulation scheme code 1 code at the bottom code at the bottom code at the bottom code at the bottom 1 Today, when 5G has become popular, various devices have been oriented to digitization. Today, let's learn DIY, a 4G intelligent unmanned vehicle Hardware preparation: ...

1. Project overview Implement a mobile App that can control home devices and obtain relevant temperature and humidity information. App calls HTTP service on ECs; HTTP service encapsulates MQTT subscription and push requests to update the MQTT server; The esp8266 module is connected to the MQTT server through networking, sends the data tr ...

How to realize GPS positioning function with development board brief introduction GPS positioning is one of the common functions. This paper introduces how to use Air724 development board + 530 development board to demonstrate the GPS positioning function. stores reserve 1.EVB_Air724UG_A13 A set of development boards and Air530 GPS A set of ...

FreeRTOS operating system learning preface Interrupt is a very common feature of microcontroller. Interrupt is generated by hardware. When interrupt is generated, CPU will interrupt the current The MCU of Cortex-M kernel provides a nested vector interrupt for interrupt management Controller (NVIC). The NVIC of Cotex-M3 supports up to 24 ...

brief introduction target Translation and supplement open62541v1 2 official manual. Information model callback There are three places where callbacks from the information model to user-defined code can occur. Custom node constructors and destructorsLinking VariableNodes to external data sourcesMethod node callback void UA_Server_ ...

brief introduction open62541 uses CMake to build libraries and binaries. The version of the library is automatically detected with git describe. This command returns a valid version string based on the current tag. If you don't clone the source code directly, but use a tar or zip package from the release, you need to specify the version ma ...

brief introduction The client implementation allows remote access to all OPC UA services. For convenience, some functions have been wrapped in Advanced abstraction Yes. However, at present, the client does not contain its own thread or event driven main loop, which means that the client will not automatically perform any action in the bac ...

brief introduction When writing an application, it is more comfortable to use some GUI tools to create an information model. Most tools can export data according to OPC UA Nodeset XML schema. open62541 includes a python based nodeset compiler, which can transform these information model definitions into a working server. Note that you can ...

brief introduction When writing an application, it is more comfortable to use some GUI tools to create an information model. Most tools can export data according to OPC UA Nodeset XML schema. open62541 includes a python based nodeset compiler, which can transform these information model definitions into a working server. Note that you can ...

Harmony OS device development learning record (12) -- light the oled to display Chinese characters and pictures through I2C. Based on hispark wifi suite, harmony os 2.0 full code is adopted 1, See the schematic diagram to determine the hardware circuit Schematic diagram of oled 2, Create a demo file in the source code First, clone the dri ...