SIM800L模块发送短信

作者: HUI 发布: 2022年5月8日 6阅读 0评论

因为项目需求需要使用到SIM短信模块，记录下SIM模块的使用记录。 1，准备工作 …

因为项目需求需要使用到SIM短信模块，记录下SIM模块的使用记录。

1，准备工作
需要一块SIM模块，我使用的是SIM800L模块，淘宝可以购买到，如图所示，

推荐购买这一款，板上集成了电压模块，不需要单独使用3.7v供电，比较方便。

一张电话卡，自己手机的电话卡即可，同时还需要一个卡套，不然卡放不进去。

2，调试工作
插上卡，上电以后，模块会自动寻找信号，串口助手发送AT,
模块返回ok，表示成功。
然后发送 AT+CMGF=1 将短信模式设置为 text mode (模块默认是 pdu mode)，

然后发送 AT+CMGS=“此处输入对应的电话号码”，等待模块返回 ‘>’ 字符，输入短信内容，
短信内容输入完成以后，发送十六进制的0x1a完成发送，记住，是16进制的。
如果一切顺利，此时你的手机可以收到你的短信。

3，单片机移植
已经知道了at指令的流程，就需要配置串口就行了。
串口.h文件的配置，使用的stm32的串口2

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<span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USARTx USART2</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_CLK RCC_APB1Periph_USART2</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_APBxClkCmd RCC_APB1PeriphClockCmd</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_BAUDRATE 115200</span>  <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_GPIO_CLK RCC_APB2Periph_GPIOA</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_GPIO_APBxClkCmd RCC_APB2PeriphClockCmd</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_TX_GPIO_PORT GPIOA </span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_TX_GPIO_PIN GPIO_Pin_2</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_RX_GPIO_PORT GPIOA</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_RX_GPIO_PIN GPIO_Pin_3</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_IRQ USART2_IRQn</span> <span class="token macro property">#<span class="token directive keyword">define</span> DEBUG_USART_IRQHandler USART2_IRQHandler</span>

c文件的定义

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<span class="token keyword">void</span> <span class="token function">USART_Config</span><span class="token punctuation">(</span><span class="token keyword">void</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span> GPIO_InitTypeDef GPIO_InitStructure<span class="token punctuation">;</span> USART_InitTypeDef USART_InitStructure<span class="token punctuation">;</span>  <span class="token function">DEBUG_USART_GPIO_APBxClkCmd</span><span class="token punctuation">(</span>DEBUG_USART_GPIO_CLK<span class="token punctuation">,</span> ENABLE<span class="token punctuation">)</span><span class="token punctuation">;</span>  <span class="token function">DEBUG_USART_APBxClkCmd</span><span class="token punctuation">(</span>DEBUG_USART_CLK<span class="token punctuation">,</span> ENABLE<span class="token punctuation">)</span><span class="token punctuation">;</span>  GPIO_InitStructure<span class="token punctuation">.</span>GPIO_Pin <span class="token operator">&#61;</span> DEBUG_USART_TX_GPIO_PIN<span class="token punctuation">;</span> GPIO_InitStructure<span class="token punctuation">.</span>GPIO_Mode <span class="token operator">&#61;</span> GPIO_Mode_AF_PP<span class="token punctuation">;</span> GPIO_InitStructure<span class="token punctuation">.</span>GPIO_Speed <span class="token operator">&#61;</span> GPIO_Speed_50MHz<span class="token punctuation">;</span> <span class="token function">GPIO_Init</span><span class="token punctuation">(</span>DEBUG_USART_TX_GPIO_PORT<span class="token punctuation">,</span> <span class="token operator">&amp;</span>GPIO_InitStructure<span class="token punctuation">)</span><span class="token punctuation">;</span>  GPIO_InitStructure<span class="token punctuation">.</span>GPIO_Pin <span class="token operator">&#61;</span> DEBUG_USART_RX_GPIO_PIN<span class="token punctuation">;</span> GPIO_InitStructure<span class="token punctuation">.</span>GPIO_Mode <span class="token operator">&#61;</span> GPIO_Mode_IN_FLOATING<span class="token punctuation">;</span> <span class="token function">GPIO_Init</span><span class="token punctuation">(</span>DEBUG_USART_RX_GPIO_PORT<span class="token punctuation">,</span> <span class="token operator">&amp;</span>GPIO_InitStructure<span class="token punctuation">)</span><span class="token punctuation">;</span>   USART_InitStructure<span class="token punctuation">.</span>USART_BaudRate <span class="token operator">&#61;</span> DEBUG_USART_BAUDRATE<span class="token punctuation">;</span>  USART_InitStructure<span class="token punctuation">.</span>USART_WordLength <span class="token operator">&#61;</span> USART_WordLength_8b<span class="token punctuation">;</span>  USART_InitStructure<span class="token punctuation">.</span>USART_StopBits <span class="token operator">&#61;</span> USART_StopBits_1<span class="token punctuation">;</span>  USART_InitStructure<span class="token punctuation">.</span>USART_Parity <span class="token operator">&#61;</span> USART_Parity_No <span class="token punctuation">;</span>  USART_InitStructure<span class="token punctuation">.</span>USART_HardwareFlowControl <span class="token operator">&#61;</span> USART_HardwareFlowControl_None<span class="token punctuation">;</span>  USART_InitStructure<span class="token punctuation">.</span>USART_Mode <span class="token operator">&#61;</span> USART_Mode_Rx <span class="token operator">|</span> USART_Mode_Tx<span class="token punctuation">;</span>  <span class="token function">USART_Init</span><span class="token punctuation">(</span>DEBUG_USARTx<span class="token punctuation">,</span> <span class="token operator">&amp;</span>USART_InitStructure<span class="token punctuation">)</span><span class="token punctuation">;</span>  <span class="token function">USART_Cmd</span><span class="token punctuation">(</span>DEBUG_USARTx<span class="token punctuation">,</span> ENABLE<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span>

接下来是发送函数的定义
只用到了三个函数

``

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<span class="token keyword">void</span> <span class="token function">Usart_SendByte</span><span class="token punctuation">(</span> USART_TypeDef <span class="token operator">*</span> pUSARTx<span class="token punctuation">,</span> uint8_t ch<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>  <span class="token function">USART_SendData</span><span class="token punctuation">(</span>pUSARTx<span class="token punctuation">,</span>ch<span class="token punctuation">)</span><span class="token punctuation">;</span>  <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">USART_GetFlagStatus</span><span class="token punctuation">(</span>pUSARTx<span class="token punctuation">,</span> USART_FLAG_TXE<span class="token punctuation">)</span> <span class="token operator">&#61;&#61;</span> RESET<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span>  <span class="token keyword">void</span> <span class="token function">Usart_SendString</span><span class="token punctuation">(</span> USART_TypeDef <span class="token operator">*</span> pUSARTx<span class="token punctuation">,</span> <span class="token keyword">char</span> <span class="token operator">*</span>str<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span> <span class="token keyword">unsigned</span> <span class="token keyword">int</span> k<span class="token operator">&#61;</span><span class="token number">0</span><span class="token punctuation">;</span> <span class="token keyword">do</span> <span class="token punctuation">{<!-- --></span> <span class="token function">Usart_SendByte</span><span class="token punctuation">(</span> pUSARTx<span class="token punctuation">,</span> <span class="token operator">*</span><span class="token punctuation">(</span>str <span class="token operator">&#43;</span> k<span class="token punctuation">)</span> <span class="token punctuation">)</span><span class="token punctuation">;</span> k<span class="token operator">&#43;&#43;</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">while</span><span class="token punctuation">(</span><span class="token operator">*</span><span class="token punctuation">(</span>str <span class="token operator">&#43;</span> k<span class="token punctuation">)</span><span class="token operator">!&#61;</span><span class="token string">&#39;\0&#39;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>  <span class="token keyword">while</span><span class="token punctuation">(</span><span class="token function">USART_GetFlagStatus</span><span class="token punctuation">(</span>pUSARTx<span class="token punctuation">,</span>USART_FLAG_TC<span class="token punctuation">)</span><span class="token operator">!&#61;</span>SET<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span>  <span class="token keyword">void</span> <span class="token function">Usart_SendHalfWord</span><span class="token punctuation">(</span> USART_TypeDef <span class="token operator">*</span> pUSARTx<span class="token punctuation">,</span> uint16_t ch<span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span> uint8_t temp_h<span class="token punctuation">,</span> temp_l<span class="token punctuation">;</span>  temp_h <span class="token operator">&#61;</span> <span class="token punctuation">(</span>ch<span class="token operator">&amp;</span><span class="token number">0XFF00</span><span class="token punctuation">)</span><span class="token operator">&gt;&gt;</span><span class="token number">8</span><span class="token punctuation">;</span>  temp_l <span class="token operator">&#61;</span> ch<span class="token operator">&amp;</span><span class="token number">0XFF</span><span class="token punctuation">;</span>  <span class="token function">USART_SendData</span><span class="token punctuation">(</span>pUSARTx<span class="token punctuation">,</span>temp_h<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">USART_GetFlagStatus</span><span class="token punctuation">(</span>pUSARTx<span class="token punctuation">,</span> USART_FLAG_TXE<span class="token punctuation">)</span> <span class="token operator">&#61;&#61;</span> RESET<span class="token punctuation">)</span><span class="token punctuation">;</span>  <span class="token function">USART_SendData</span><span class="token punctuation">(</span>pUSARTx<span class="token punctuation">,</span>temp_l<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token function">USART_GetFlagStatus</span><span class="token punctuation">(</span>pUSARTx<span class="token punctuation">,</span> USART_FLAG_TXE<span class="token punctuation">)</span> <span class="token operator">&#61;&#61;</span> RESET<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span>

1
只用这三个函数就够了 &#96;&#96;&#96;bash Usart_SendString( DEBUG_USARTx,&#34;AT\r\n&#34;); delay(); Usart_SendString( DEBUG_USARTx,&#34;AT&#43;CMGF&#61;1\r\n&#34;); delay(); Usart_SendString( DEBUG_USARTx,&#34;AT&#43;CMGS&#61;\&#34;填入自己的手机号\&#34;\r\n&#34;); delay(); Usart_SendString( DEBUG_USARTx,&#34;warning! warning !\r\n&#34;); delay(); // printf(&#34;0x%x&#34;,aa); Usart_SendHalfWord(DEBUG_USARTx,0x1a);

=按照顺序发送at指令，就可以了。

sim800l的最简单的发送短信在单片机上面就这样跑起来了。
谢谢观看

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作者: HUI

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