那么我们再来看一下DHT11通过单总线发送的数据格式,了解了数据格式可以更好的帮助我们理解程序是如何读取温湿度的,因为数据传输在硬件层就是电平高低,转化为计算机语言就是0/1,我们就是通过DHT11发送的这些0/1中找出温湿度的值: 可以看到一共是有40位数据的,每8位是一组,包含了温湿度和校验值,校验值等于温湿度...
SPI_SPEED?=40 SPI_MODE?=QIO SPI_SIZE_MAP?=6 1. 2. 3. 4. 5. 于是乎,上面的配置就生成如下(boot.bin文件版本支持1.4或以上): ②生成user2.bin文件:修改您的bug之后,就修改APP?=2即可! BOOT?=new APP?=2 //此刻生成的是 user2.bin文件 SPI_SPEED?=40 SPI_MODE?=QIO SPI_SIZE_MAP?=6 1...
The SHT40 builds on a completely new and optimized CMOSens® chip that offers reduced power consumption and improved accuracy specifications. With the extended supply voltage range from 1.08 V to 3.6 V, it’s the perfect fit for mobile and battery-driven applications. Here is the sen...
During yesterday's many code uploads I tried to pay more attention to the displayed crystal freq. For the times that I did remember to look at the freq it did seem to be more often but I'm no longer convinced it is much more. I'll try to monitor it more today for a better idea ...
Refer to IPC/JEDEC standard;Peak Temperature : <250°C;Number of Times: ≤2 times; 图5推荐回流曲线图 2. 2.1. ESP8266可以实现的主要功能包括:串口透传,PWM 调控,GPIO控制。 串口透传:数据传输,传输的可靠性好,最大的传输速率为:460800bps。 PWM 调控:灯光调节,三色LED 调节,电机调速等。 GPIO控制:控...
update->pespconn = (structespconn*)os_zalloc(sizeof(structespconn));//设置服务器地址os_memcpy(update->ip, server_ip,4);//设置服务器端口update->port = port;//设置OTA回调函数update->check_cb = ota_finished_callback;//设置定时回调时间update->check_times =10000;//从 4M *1024 =4096申...
所谓“底层数据包”指的是在“运行”于数据链路层的数据包，简单的说就是“以太网帧”，而我们常用的Socket只能发送“运行”在传输层的TCP、UDP等包，这些传输层数据包已经能满足绝大部分需求，但是有些时候还是需要发送底层数据包的（例如SYN扫描），那么如何发送呢？
load 0x3fff20b8, len 40, room 4 tail 4 chksum 0xc9 csum 0xc9 v0007f2f0 ~ld [I][logger:262]: Log initialized [C][ota:469]: There have been 1 suspected unsuccessful boot attempts. [I][app:029]: Running through setup()... ...
Furthermore, the ESP32 is a dependable board, despite the fact that its firmware and attached peripherals can be flaky at times. Secure sockets layer (SSL) connections become increasingly viable as memory and processing power increase, which are critical criteria in a society where security is ...
i2c_master_checkAck() )37{38i2c_master_stop();39return(0);40}4142i2c_master_writeByte( MemAddress );43if( !i2c_master_checkAck() )44{45i2c_master_stop();46return(0);47}4849i2c_master_writeByte( pData );50if( !i2c_master_checkAck() )51{52i2c_master_stop();53return(0);54}...