[size=4][b]What is fast charging of batteries? [/b][/size] [size=4] First of all, we need to understand the charging and discharging principle of lithium-ion batteries. Batteries have two poles: the p
Many IoT applications now generally use LoRa chips, but not LoRaWan network protocols. After investigation, it was found that the reasons for not using the LoRaWAN network protocol are: small number o
A few days ago, I saw a lot of things similar to WeChat group plug-ins. One person sells for 199 per year, and the sales volume is several thousand, 100,000 per year. I think this thing is quite amazi