The E840-DTU I requested has finally arrived. Let’s take a look at this:Since DTU only has one host, you need to equip yourself with a SIM card, antenna, 8-28V DC power supply, and 485/232 to TTL befo
Signal and GND,Some signals need to be grounded, such as serial port, IIC, SPI, clock, crystal oscillator, etc., while some signals need to hollow out GND, such as Bluetooth, WIFI, zigbee, LOWAR, UWB,
Hello everyone, I adjusted the USB test program on the SEED development board and it runs normally. Its USB has two enumerations, one is EEPROM and the other is DSP enumeration. Both can be implemente
Everyone is so irritable, listen to music in the quiet night. In this world where right and wrong are not distinguished, there is no such thing as good or bad. Bad things can be said to be good, and t