uniapp蓝牙传输中文乱码问题

wx_h138137442023-12-07 9:50

uniapp蓝牙传输中文乱码问题

0 现状

传输数字和字母的json字符串都可以解析，有个中文的硬件那边就解析不了，替换一下发数据的处理函数即可

1 原先字符串转化函数

js 复制代码

const stringToBytes = (msg) => {
	 const buffer = new ArrayBuffer(msg.length)
	 const dataView = new DataView(buffer)
	 for (var i = 0; i < msg.length; i++) {
	 	dataView.setUint8(i, msg.charAt(i).charCodeAt())
	}
	 return buffer


}

2 新的字符串替换函数

js 复制代码

const stringToBytes = (msg) => {
	
	const bytes = [];

	for (let i = 0; i < msg.length; ++i) {
		const charCode = msg.charCodeAt(i);

		if (charCode < 0x80) {
			bytes.push(charCode);
		} else if (charCode < 0x800) {
			bytes.push(0xC0 | (charCode >> 6), 0x80 | (charCode & 0x3F));
		} else if (charCode < 0x10000) {
			bytes.push(
				0xE0 | (charCode >> 12),
				0x80 | ((charCode >> 6) & 0x3F),
				0x80 | (charCode & 0x3F)
			);
		} else if (charCode < 0x200000) {
			bytes.push(
				0xF0 | (charCode >> 18),
				0x80 | ((charCode >> 12) & 0x3F),
				0x80 | ((charCode >> 6) & 0x3F),
				0x80 | (charCode & 0x3F)
			);
		} else if (charCode < 0x4000000) {
			bytes.push(
				0xF8 | (charCode >> 24),
				0x80 | ((charCode >> 18) & 0x3F),
				0x80 | ((charCode >> 12) & 0x3F),
				0x80 | ((charCode >> 6) & 0x3F),
				0x80 | (charCode & 0x3F)
			);
		} else {
			bytes.push(
				0xFC | (charCode >> 30),
				0x80 | ((charCode >> 24) & 0x3F),
				0x80 | ((charCode >> 18) & 0x3F),
				0x80 | ((charCode >> 12) & 0x3F),
				0x80 | ((charCode >> 6) & 0x3F),
				0x80 | (charCode & 0x3F)
			);
		}
	}

	const buffer = new Uint8Array(bytes).buffer;
	return buffer;


}

真的很神奇