{"id":7459,"date":"2026-04-16T11:22:03","date_gmt":"2026-04-16T03:22:03","guid":{"rendered":"https:\/\/meskernel.net\/?p=7459"},"modified":"2026-04-16T13:44:23","modified_gmt":"2026-04-16T05:44:23","slug":"ttl-uart","status":"publish","type":"post","link":"https:\/\/meskernel.net\/pt\/ttl-uart\/","title":{"rendered":"TTL UART Laser Distance Sensor Communication: Data Frame Structure, Checksum &amp; Arduino Parsing"},"content":{"rendered":"\n<p><a href=\"https:\/\/meskernel.net\/pt\/laser-distance-tech\/\">Laser distance<\/a> sensors with a TTL <a href=\"https:\/\/meskernel.net\/pt\/usart-vs-uart\/\">UART<\/a> interface are widely used in robotics, automation, and embedded systems.<br>However, in real-world integration of LDL-S series TTL laser <a href=\"https:\/\/meskernel.net\/pt\/products\/\">distance sensor<\/a> modules, most issues do not come from wiring, but from misunderstanding the UART data frame format, distance parsing logic, and checksum mechanism.<\/p>\n\n\n\n<p>This document serves as an official technical guide and protocol reference for LDL-S series TTL UART <a href=\"https:\/\/meskernel.net\/pt\/laser-distance-sensors\/\">laser distance sensors<\/a>.<br>All protocol descriptions, data formats, and code examples are based on the actual default UART output behavior of the LDL-S series, and are consistent with the official <a href=\"https:\/\/meskernel.net\/pt\/arduino-laser-distance-modules\/\">Arduino<\/a> test logic supplied with the products.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-dominant-color=\"e9e9e8\" data-has-transparency=\"false\" style=\"--dominant-color: #e9e9e8;\" fetchpriority=\"high\" decoding=\"async\" width=\"566\" height=\"365\" src=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Lightweight-Laser-Distance-Sensor.webp\" alt=\"Lightweight Laser Distance Sensor\" class=\"wp-image-7128 not-transparent\" srcset=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Lightweight-Laser-Distance-Sensor.webp 566w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Lightweight-Laser-Distance-Sensor-300x193.webp 300w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Lightweight-Laser-Distance-Sensor-18x12.webp 18w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Lightweight-Laser-Distance-Sensor-400x258.webp 400w\" sizes=\"(max-width: 566px) 100vw, 566px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What Is the TTL UART Protocol Used by the LDL-S Series?<\/h2>\n\n\n\n<p>LDL-S series laser distance sensors transmit measurement data using a TTL-level UART interface, enabling direct connection to <a href=\"https:\/\/meskernel.net\/pt\/microcontrollers-and-laser-sensors\/\">microcontrollers<\/a> such as Arduino, STM32, and other embedded platforms.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Default UART Parameters<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Logic level: TTL (3.3V or 5V, model-dependent)<\/li>\n\n\n\n<li>Baud rate: 115200 bps (default)<\/li>\n\n\n\n<li>Data format: 8 data bits, no parity, 1 stop bit (8N1)<\/li>\n\n\n\n<li>Flow control: None<\/li>\n\n\n\n<li>Output mode: Continuous output<\/li>\n<\/ul>\n\n\n\n<p>From a system integration perspective, the UART physical layer is straightforward.<br>The critical part lies in understanding how measurement data is framed, encoded, and validated at the protocol level.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">TTL UART Data Frame Structure (LDL-S Series)<\/h2>\n\n\n\n<p>The LDL-S series outputs distance measurements using a fixed-length binary UART data frame.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img data-dominant-color=\"f5f5f5\" data-has-transparency=\"false\" style=\"--dominant-color: #f5f5f5;\" decoding=\"async\" width=\"925\" height=\"448\" src=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/01\/green-laser-ranging-sensor-module.webp\" alt=\"green laser ranging sensor module\" class=\"wp-image-6852 not-transparent\" srcset=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/01\/green-laser-ranging-sensor-module.webp 925w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/01\/green-laser-ranging-sensor-module-300x145.webp 300w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/01\/green-laser-ranging-sensor-module-768x372.webp 768w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/01\/green-laser-ranging-sensor-module-18x9.webp 18w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/01\/green-laser-ranging-sensor-module-400x194.webp 400w\" sizes=\"(max-width: 925px) 100vw, 925px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Fixed 9-Byte UART Frame Format<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Byte Index<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td>Byte 0<\/td><td>Frame Header (0x59)<\/td><\/tr><tr><td>Byte 1<\/td><td>Frame Header (0x59)<\/td><\/tr><tr><td>Byte 2<\/td><td>Distance Low Byte<\/td><\/tr><tr><td>Byte 3<\/td><td>Distance High Byte<\/td><\/tr><tr><td>Byte 4<\/td><td>Status \/ Reserved<\/td><\/tr><tr><td>Byte 5<\/td><td>Reserved<\/td><\/tr><tr><td>Byte 6<\/td><td>Reserved<\/td><\/tr><tr><td>Byte 7<\/td><td>Reserved<\/td><\/tr><tr><td>Byte 8<\/td><td>Checksum<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Key characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Frame header is always <code>0x59 0x59<\/code><\/li>\n\n\n\n<li>Frame length is always 9 bytes<\/li>\n\n\n\n<li>Distance data is transmitted in little-endian format<\/li>\n<\/ul>\n\n\n\n<p>This fixed structure enables reliable parsing in continuous-output UART streams.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Distance Data Encoding<\/h2>\n\n\n\n<p>Distance values are transmitted as a 16-bit unsigned integer.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Distance Formula<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\">Distance (mm) = (High_Byte &lt;&lt; 8) | Low_Byte<\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unit: millimeters (mm)<\/li>\n\n\n\n<li>Byte order: little-endian (low byte first)<\/li>\n\n\n\n<li>No scaling factor is applied<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Example<\/h3>\n\n\n\n<p>If the UART output frame contains:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">0x59 0x59 0xFA 0x00 ...<\/pre>\n\n\n\n<p>Then the decoded distance is:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Distance = 0x00FA = 250 mm<\/pre>\n\n\n\n<p>The decoded value can be used directly without further conversion.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Checksum Calculation Method<\/h2>\n\n\n\n<p>The LDL-S series uses a simple 8-bit checksum to ensure data integrity.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Checksum Rule<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\">Checksum = (Byte0 + Byte1 + ... + Byte7) &amp; 0xFF<\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Only the first 8 bytes are included<\/li>\n\n\n\n<li>The calculated value must match Byte 8<\/li>\n\n\n\n<li>No XOR or CRC algorithm is used<\/li>\n<\/ul>\n\n\n\n<p>Checksum verification is mandatory for stable operation, especially in industrial or electrically noisy environments.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">UART Output Behavior<\/h2>\n\n\n\n<p>By default, LDL-S series sensors operate in continuous output mode:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Distance frames are transmitted automatically at a fixed update rate<\/li>\n\n\n\n<li>No external trigger or command is required<\/li>\n\n\n\n<li>The host MCU must continuously read and parse the UART data stream<\/li>\n<\/ul>\n\n\n\n<p>A robust parsing process should always follow this order:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Detect frame header <code>0x59 0x59<\/code><\/li>\n\n\n\n<li>Read a complete 9-byte frame<\/li>\n\n\n\n<li>Validate the checksum<\/li>\n\n\n\n<li>Decode the distance value<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Arduino UART Parsing Example (Official-Compatible)<\/h2>\n\n\n\n<p>The following example matches the default UART output format of LDL-S series laser distance sensors and is consistent with the official Arduino test logic.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">uint8_t buffer[9];void setup() {<br>  Serial.begin(115200);<br>}void loop() {<br>  if (Serial.available() &gt;= 9) {<br>    Serial.readBytes(buffer, 9);    \/\/ Check frame header<br>    if (buffer[0] == 0x59 &amp;&amp; buffer[1] == 0x59) {      \/\/ Calculate checksum<br>      uint8_t checksum = 0;<br>      for (int i = 0; i &lt; 8; i++) {<br>        checksum += buffer[i];<br>      }      \/\/ Verify checksum<br>      if (checksum == buffer[8]) {<br>        uint16_t distance = buffer[2] | (buffer[3] &lt;&lt; 8);        Serial.print(\"Distance: \");<br>        Serial.print(distance);<br>        Serial.println(\" mm\");<br>      }<br>    }<br>  }<br>}<\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">STM32 UART Parsing Example (HAL)<\/h2>\n\n\n\n<pre class=\"wp-block-preformatted\">uint8_t rx[9];if (HAL_UART_Receive(&amp;huart1, rx, 9, 100) == HAL_OK) {<br>  if (rx[0] == 0x59 &amp;&amp; rx[1] == 0x59) {    uint8_t checksum = 0;<br>    for (int i = 0; i &lt; 8; i++) {<br>      checksum += rx[i];<br>    }    if (checksum == rx[8]) {<br>      uint16_t distance = rx[2] | (rx[3] &lt;&lt; 8);<br>      \/\/ Distance value is in millimeters<br>    }<br>  }<br>}<\/pre>\n\n\n\n<p>For production firmware, UART reception is typically implemented using interrupts or DMA for improved reliability.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Common Parsing Issues &amp; Troubleshooting<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Issue<\/th><th>Likely Cause<\/th><\/tr><\/thead><tbody><tr><td>Distance jumps randomly<\/td><td>Checksum not validated<\/td><\/tr><tr><td>Distance always zero<\/td><td>Incorrect byte order<\/td><\/tr><tr><td>Unstable readings<\/td><td>Frame misalignment<\/td><\/tr><tr><td>Unreadable data<\/td><td>Baud rate mismatch<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Debug recommendation:<\/strong><br>During system bring-up, use a USB-to-TTL adapter to capture raw UART frames and verify the 9-byte structure before finalizing MCU firmware.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">UART Protocol Reference Summary (LDL-S Series)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Item<\/th><th>Specification<\/th><\/tr><\/thead><tbody><tr><td>Interface<\/td><td>TTL UART<\/td><\/tr><tr><td>Frame Length<\/td><td>9 bytes (fixed)<\/td><\/tr><tr><td>Frame Header<\/td><td><code>0x59 0x59<\/code><\/td><\/tr><tr><td>Distance Bytes<\/td><td>Byte2 (Low), Byte3 (High)<\/td><\/tr><tr><td>Distance Unit<\/td><td>Millimeters (mm)<\/td><\/tr><tr><td>Byte Order<\/td><td>Little-endian<\/td><\/tr><tr><td>Checksum<\/td><td>8-bit sum (Byte0\u2013Byte7)<\/td><\/tr><tr><td>Output Mode<\/td><td>Continuous<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img data-dominant-color=\"4c4f4b\" data-has-transparency=\"false\" style=\"--dominant-color: #4c4f4b;\" decoding=\"async\" width=\"365\" height=\"200\" data-id=\"7329\" src=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Perimeter-Security-Intrusion-Detection.webp\" alt=\"Perimeter Security &amp; Intrusion Detection\" class=\"wp-image-7329 not-transparent\" srcset=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Perimeter-Security-Intrusion-Detection.webp 365w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Perimeter-Security-Intrusion-Detection-300x164.webp 300w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/Perimeter-Security-Intrusion-Detection-18x10.webp 18w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-dominant-color=\"848b8a\" data-has-transparency=\"false\" style=\"--dominant-color: #848b8a;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-id=\"7181\" src=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors.webp\" alt=\"I2C Distance Sensors\" class=\"wp-image-7181 not-transparent\" srcset=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors.webp 1024w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors-300x300.webp 300w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors-150x150.webp 150w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors-768x768.webp 768w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors-12x12.webp 12w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors-400x400.webp 400w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/03\/I2C-Distance-Sensors-100x100.webp 100w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-dominant-color=\"d1c8bb\" data-has-transparency=\"false\" style=\"--dominant-color: #d1c8bb;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"644\" data-id=\"7044\" src=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/02\/Lightweight-and-Compact-Laser-Distance-Sensors-1024x644.webp\" alt=\"Lightweight and Compact Laser Distance Sensors\" class=\"wp-image-7044 not-transparent\" srcset=\"https:\/\/meskernel.net\/wp-content\/uploads\/2026\/02\/Lightweight-and-Compact-Laser-Distance-Sensors-1024x644.webp 1024w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/02\/Lightweight-and-Compact-Laser-Distance-Sensors-300x189.webp 300w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/02\/Lightweight-and-Compact-Laser-Distance-Sensors-768x483.webp 768w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/02\/Lightweight-and-Compact-Laser-Distance-Sensors-18x12.webp 18w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/02\/Lightweight-and-Compact-Laser-Distance-Sensors-400x252.webp 400w, https:\/\/meskernel.net\/wp-content\/uploads\/2026\/02\/Lightweight-and-Compact-Laser-Distance-Sensors.webp 1144w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Protocol Applicability &amp; Disclaimer<\/h2>\n\n\n\n<p>This protocol description applies only to LDL-S series <a href=\"https:\/\/meskernel.net\/en\/laser-distance-sensor\/\">TTL laser distance sensors<\/a> operating in their default continuous output mode.<\/p>\n\n\n\n<p>Please note:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>UART protocol details may vary across different sensor series or firmware versions<\/li>\n\n\n\n<li>This document does not apply to RS232, RS485, CAN, Ethernet, or ASCII-output sensors<\/li>\n\n\n\n<li>Customized firmware or command-based modes may use different data formats<\/li>\n<\/ul>\n\n\n\n<p>Always refer to the official documentation supplied with the specific product when working outside default configurations.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.youtube.com\/@Meskernelnet\/videos\" target=\"_blank\" rel=\"noopener\">Different rangefinder modules explained in visual demonstrations<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Integration Best Practices (Manufacturer Recommendations)<\/h2>\n\n\n\n<p>Based on practical integration experience with LDL-S series sensors:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Always validate frame headers to prevent stream misalignment<\/li>\n\n\n\n<li>Never skip checksum verification in production systems<\/li>\n\n\n\n<li>Use interrupt or DMA-based UART reception for stable long-term operation<\/li>\n\n\n\n<li>Verify raw UART data first before implementing application-level logic<\/li>\n<\/ol>\n\n\n\n<p>These practices significantly reduce integration risk and improve system reliability.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<p>This document provides a complete and accurate description of the TTL UART protocol used by <a href=\"https:\/\/meskernel.net\/en\/product\/1mm-laser-distance-sensor-module\/\">LDL-S series laser distance sensor modules<\/a>, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fixed 9-byte UART data frame<\/li>\n\n\n\n<li>Little-endian distance encoding in millimeters<\/li>\n\n\n\n<li>Mandatory 8-bit checksum validation<\/li>\n\n\n\n<li>Official-compatible Arduino and STM32 parsing examples<\/li>\n<\/ul>\n\n\n\n<p>Correct implementation of this protocol ensures stable distance measurements and reliable integration of LDL-S series laser distance sensors into embedded systems.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-question-1776306932752\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Can I directly connect the LDL-S sensor to an Arduino or STM32?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Yes.<br \/>The LDL-S series uses a TTL-level UART interface, which can be directly connected to:<br \/>Arduino boards<br \/>STM32 microcontrollers<br \/>Other embedded controllers with TTL UART ports<br \/>Please ensure:<br \/>Voltage level compatibility (3.3V or 5V, model-dependent)<br \/>Correct baud rate configuration (115200 bps by default)<br \/>No external protocol converter is required.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1776306960144\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Does the LDL-S series require any trigger command to start measurement?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>No.<br \/>By default, LDL-S series sensors operate in continuous output mode.<br \/>Distance data frames are transmitted automatically after power-up.<br \/>This makes the sensor easy to integrate for:<br \/>Real-time monitoring<br \/>Continuous distance feedback<br \/>Fast system bring-up and testing<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1776306979693\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">What is the output unit of the distance data?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>The distance value is output in millimeters (mm).<br \/>The decoded value from the UART frame can be used directly, without any scaling or unit conversion.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1776306996917\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">How do I know if a UART data frame is valid?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>A valid LDL-S UART frame must meet all of the following conditions:<br \/>Frame header equals <code>0x59 0x59<\/code><br \/>Total frame length is exactly 9 bytes<br \/>Checksum matches the calculated 8-bit sum of Byte0\u2013Byte7<br \/>If any of these checks fail, the frame should be discarded.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1776307011126\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">What happens if I ignore checksum validation?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Ignoring checksum validation may lead to:<br \/>Random distance jumps<br \/>Occasional incorrect readings<br \/>Unstable system behavior in noisy environments<br \/>For any production system, checksum validation is strongly recommended and should not be skipped.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1776307025125\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Can I change the UART baud rate or output mode?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>The default configuration is optimized for general integration.<br \/>If your application requires:<br \/>Different baud rates<br \/>Command-based output<br \/>Customized data formats<br \/>Please contact technical support before placing an order, as these options may require firmware customization.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Understand the laser distance sensor TTL UART protocol, including data frame structure, distance parsing, checksum methods, and common protocol variants. Practical examples for Arduino and STM32 integration.<\/p>","protected":false},"author":1,"featured_media":7463,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[50],"tags":[],"class_list":["post-7459","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"_links":{"self":[{"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/posts\/7459","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/comments?post=7459"}],"version-history":[{"count":4,"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/posts\/7459\/revisions"}],"predecessor-version":[{"id":7467,"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/posts\/7459\/revisions\/7467"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/media\/7463"}],"wp:attachment":[{"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/media?parent=7459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/categories?post=7459"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/meskernel.net\/pt\/wp-json\/wp\/v2\/tags?post=7459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}