thermal printer module full test, self-test, demo code test, bitmap qr code print test

Esp32-c3 #rs232 #rs485 data board in case #esp32

Stm32 online and offline programmer setup guide

Esp32-c3 native usb flashing, and communicate with software serial rs232 #esp32

usb to rs232, rs232 to usb, rs232 to rs485, rs485 to usb, rs485 to rs485, rs232 to rs232

initiate a design with esp32, cases, connectors

nbiot + gnss low power 3.3v module #gps #gnss

layout issue: v-cut with small boards problem #pcb

layout issue: pogo testing pin 1*4 pins for pcbs test

cn fab machine vlog 20240724

nwi1245 rs485 and can data send demo test #rs485 #can #esp32

SIM7020 hack for low power sleep mode demo, same for psm edrx mode #simcom #nbiot

logic analyzer software with open source software pulseview test #hardware

sim7020 nbiot basic usage at commands test

INA219 voltage current demo test #circuit #arduino #pcb #sensor

app: mt7688 usb wifi camera #circuit #solution #pcb

hx711 weight sensor test demo

simcom sim7000g nbiot network status check, active network and ping bing.com #circuit #pcb #nbiot

thermal printer module full test, self-test, demo code test, bitmap qr code print test

simcom sim7000g gps test demo #pcb #circuit

board: quectel ec20 lte module basic functions demo #pcb #circuit

board: usb keyboard data to rs-485 usb1003 #pcb #circuit

board: esp32 wire board, support rs485 can. nwi1245 #circuit #pcb

module: 74hc595d drived 7-segment led display module ims1030 #pcb #circuit

board: bq51050 wireless battery charging board opm1168 #circuit #pcb