理论 # 洪城小电工 on 简书 # 从零开始理解 IEC104 协议之一 104 规约帧格式, bak 从零开始理解 IEC104 协议之二 基础知识, bak 从零开始理解 IEC104 协议之三 主要过程中的一些技术细节, bak 从零开始理解 IEC104 协议之四 工程调试经验总结, bak 从零开始理解 IEC104 协议之五 数据安全, bak 工具 # 经典、简约的 101 和 104 主站、从站模拟器 # PMA 使用方法 by forum.huawei， bak 101_104_MASTER, bak 其他 # 看起来比较不错的一款收费软件 CNY55~70（没有试过）
Coral Edge Accelerator # ML accelerator: Edge TPU ASIC (application-specific integrated circuit) designed by Google. Provides high-performance ML inferencing for TensorFlow Lite Models. USB 3.1 (gen 1) port and cable (SuperSpeed, 5Gb/s transfer speed) Dimensions: 30 x 65 x 8mm Price: USD74.99 in 2019, USD ＄ 60 in 2021, ￥ 740 @JD.com 0.5 watts/TOPS MAX 4 TOPS (int8), 2W. TF Lite + Debian only. Not available world wide Intel NCS2 Neural Compute Stick 2 # Processor: Intel Movidius Myriad X Vision Processing Unit (VPU) USB 3. ...
OSI vs. Modbus Layers: Tip: RS-485/RS485’s new name is EIA-485. UART usually (99%) means TTL in shops, not 232/485. DB9 physical port usually (90%) means 232 electrical signals level standards. Modbus Protocol # See Also： 【strongly recommend！】 a nice intro to Modbus and Modbus Enron. (Simply Modbus 软件收费，但是这个 Modbus 入门文档非常好) 一文看懂 Modbus 协议 Complete Modbus Guide. a good intro to Modbus. Each Modbus Slave has 4 tables with 9999 values in each table. ...
SERVERS (MQTT BROKER) # Emqx (Suggested) # docker 等各种安装方式： Download EMQX Open Source (推荐), 或 github. （也可以用老版本，same company as MQTTX.） Require: Erlang (150MB) (will install MS VC++ Redist. 2015). ref download： https://www.emqx.io/downloads?os=Windows cd emqx5\bin emqx.cmd start emqx.cmd ping # should show "pong" for ok web: localhost:18083 default account: admin/public , pwd change is a MUST when login, could change to admin/admin. for topics, user/auth: any or empty ref: EMQX dashboard, bak ...