LAN8720 PHY<--->STM32F4 TX1 <---> PB_13 TX_EN <---> PB_11 TX0 <---> PB_12 RX0 <---> PC_4 RX1 <---> PC_5 nINT/RETCLK <---> PA_1 CRS <---> PA_7 MDIO <---> PA_2 MDC <---> PC_1 GND <---> GND VCC <---> +3.3V...
SIM8008是四频模块,全球可用。含有TTL电平接口等接口,能够实现发短信、打电话、GPRS传输数据、GPS等功能。[正版资料请找beautifulzzzz·博客园] 一些细节: >>5V供电1A以上(用USB转TTL模块上的电源可以驱动,亲试) >>上图黑色的线是VCC,白色线是GND,绿色线是TXD连接单片机或USB转TTL的RXD引脚,橙色的线类推。 >>...
>>5V供电1A以上（用USB转TTL模块上的电源可以驱动，亲试）>>上图黑色的线是VCC，白色线是GND，绿色...
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1、初始化这个开发板:并没有什么其他接口,RX,TX,GND,VCC还是5V,反正我接了5V这么久没烧。不用刷所以也不用下载什么开发板,修改什么开发环境,还是UNO就可以。命令主要就是这么几条: intinitESP8266() {intresult =0; String val="";if(!DoATCommand("AT+CIPMODE=1",1000,10,"OK", val)) { ...
ESP8266的接线则稍微复杂一些,将CH_PD脚和VCC脚接3.3V(连接5V将烧毁ESP8266),GND接地,在烧写程序时,UTXD连接Arduino的TX脚,URXD连接Arduino的RX脚。而在系统运行时,这两个引脚要互换。特别要注意的是,将GPIO16脚拉低并释放后可以重启ESP8266,用于程序烧写后重启ESP8266。
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1) Connect VCC of the moisture sensor to pin D7 on the NodeMCU. 2) Connect the sensor Gnd to the NodeMCU ground. 3) Connect the sensor Sig pin to NodeMCU pin A0. 4) Connect the NodeMCU Rst pin to NodeMCU pin D0, to enable wake up from deep sleep. ...
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