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SeanXiaojyy任乐涛
SeanXiaojyy
authored and
任乐涛
committed
Normalize PIR and Switch include paths
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‎README.md‎

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@@ -112,4 +112,34 @@ Chain RGB integrates an STM32G031G8U6 core microcontroller and uses a UART seria
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https://docs.m5stack.com/en/products/sku/U218
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## License
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- [MIT](https://github.com/m5stack/M5Chain/blob/main/LICENSE)
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- [MIT](https://github.com/m5stack/M5Chain/blob/main/LICENSE)
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# Chain PIR
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## Overview
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Chain PIR is a passive infrared human detection sensor node in the M5Stack Chain series. It can read the current PIR detection status and report person-come or person-leave trigger events. It also supports report mode configuration and a person-come trigger keep time, during which leave events are ignored until the hold time expires.
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Chain PIR integrates an STM32G031G8U6 core MCU and uses a UART serial daisy-chain communication protocol. Through two HY2.0-4P expansion interfaces, it can be connected with additional Chain series devices to build richer sensing and automation applications. It is suitable for human presence detection, motion-triggered interaction, smart home sensing, and security monitoring scenarios.
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### SKU: U225
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## Related Link
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https://docs.m5stack.com/en/products/sku/U225
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## License
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- [MIT](https://github.com/m5stack/M5Chain/blob/main/LICENSE)
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# Chain Switch
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## Overview
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Chain Switch is a slide switch input node in the M5Stack Chain series. It supports reading 12-bit ADC values, 8-bit mapped ADC values, and the current open/close switch status. It also supports configurable open and close thresholds, down-to-up direction settings, and automatic open/close trigger reports.
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Chain Switch integrates an STM32G031G8U6 core MCU and uses a UART serial daisy-chain communication protocol. Through two HY2.0-4P expansion interfaces, it can be connected with additional Chain series devices to build richer interactive applications. It is suitable for switch state detection, human-machine interaction, smart home control, and other state monitoring scenarios.
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### SKU: U227
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## Related Link
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https://docs.m5stack.com/en/products/sku/U227
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## License
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- [MIT](https://github.com/m5stack/M5Chain/blob/main/LICENSE)

‎examples/PIR_Example/pir_example.ino‎

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/*
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*SPDX-FileCopyrightText: 2026 M5Stack Technology CO LTD
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*
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*SPDX-License-Identifier: MIT
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*/
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#include "M5Chain.h"
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#define TXD_PIN GPIO_NUM_21 // Tx
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#define RXD_PIN GPIO_NUM_22 // Rx
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Chain M5Chain;
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device_list_t *devices_list = NULL;
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uint16_t device_nums = 0;
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uint8_t operation_status = 0;
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chain_status_t chain_status = CHAIN_OK;
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uint8_t rgb_test[5][3] = {
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{0xFF, 0x00, 0x00}, {0x00, 0xFF, 0x00}, {0x00, 0x00, 0xFF}, {0xFF, 0xFF, 0xFF}, {0x00, 0x00, 0x00},
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};
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uint8_t uid32[4] = {0};
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uint8_t uid96[12] = {0};
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uint8_t keep_seconds = 5;
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void printDeviceList(device_list_t *devices)
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{
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if (devices == NULL) {
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Serial.println("devices is NULL");
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return;
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}
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Serial.print("devices count: ");
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Serial.println(devices->count);
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for (uint8_t i = 0; i < devices->count; i++) {
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Serial.print("devices ID: ");
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Serial.println(devices->devices[i].id);
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Serial.print("devices type: ");
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Serial.println(devices->devices[i].device_type);
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}
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}
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void setup()
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{
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Serial.begin(115200);
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Serial.println("M5Chain PIR Test");
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M5Chain.begin(&Serial2, 115200, RXD_PIN, TXD_PIN);
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if (M5Chain.isDeviceConnected()) {
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Serial.println("devices is connected");
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chain_status = M5Chain.getDeviceNum(&device_nums);
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if (chain_status == CHAIN_OK) {
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devices_list = (device_list_t *)malloc(sizeof(device_list_t));
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if (devices_list == NULL) {
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Serial.println("devices list malloc failed");
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return;
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}
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devices_list->count = device_nums;
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devices_list->devices = (device_info_t *)malloc(sizeof(device_info_t) * device_nums);
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if (devices_list->devices == NULL) {
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Serial.println("devices info malloc failed");
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free(devices_list);
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devices_list = NULL;
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return;
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}
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if (M5Chain.getDeviceList(devices_list)) {
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Serial.println("get devices list success");
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printDeviceList(devices_list);
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} else {
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Serial.println("get devices list failed");
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}
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} else {
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Serial.printf("error status:%d \r\n", chain_status);
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Serial.printf("devices num get failed.\r\n");
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}
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} else {
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Serial.println("devices is not connected.");
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}
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if (devices_list) {
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for (uint8_t i = 0; i < devices_list->count; i++) {
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if (devices_list->devices[i].device_type == CHAIN_PIR_TYPE_CODE) {
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chain_status = M5Chain.setRGBLight(devices_list->devices[i].id, 100, &operation_status);
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if (chain_status == CHAIN_OK && operation_status) {
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Serial.printf("ID[%d] set rgb light success\r\n", devices_list->devices[i].id);
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} else {
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Serial.printf("ID[%d] set rgb light failed, chain_status:%d operation_status:%d \r\n",
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devices_list->devices[i].id, chain_status, operation_status);
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}
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for (uint8_t j = 0; j < 5; j++) {
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uint8_t rgb[3] = {0};
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chain_status =
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M5Chain.setRGBValue(devices_list->devices[i].id, 0, 1, rgb_test[j], 3, &operation_status);
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if (chain_status == CHAIN_OK && operation_status) {
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Serial.printf("ID[%d] set rgb %d %d %d success\r\n", devices_list->devices[i].id,
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rgb_test[j][0], rgb_test[j][1], rgb_test[j][2]);
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} else {
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Serial.printf("ID[%d] set rgb %d %d %d failed, chain_status:%d operation_status:%d \r\n",
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devices_list->devices[i].id, rgb_test[j][0], rgb_test[j][1], rgb_test[j][2],
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chain_status, operation_status);
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}
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chain_status = M5Chain.getRGBValue(devices_list->devices[i].id, 0, 1, rgb, 3, &operation_status);
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if (chain_status == CHAIN_OK && operation_status) {
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Serial.printf("ID[%d] get rgb %d %d %d success \r\n", devices_list->devices[i].id, rgb[0],
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rgb[1], rgb[2]);
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} else {
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Serial.printf("ID[%d] get rgb %d %d %d failed, chain_status:%d operation_status:%d \r\n",
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devices_list->devices[i].id, rgb[0], rgb[1], rgb[2], chain_status,
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operation_status);
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}
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delay(500);
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}
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uint8_t fw_version = 0;
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chain_status = M5Chain.getFirmwareVersion(devices_list->devices[i].id, &fw_version, 100);
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if (chain_status == CHAIN_OK) {
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Serial.printf("ID[%d] get firmware version: 0x%02x\r\n", devices_list->devices[i].id, fw_version);
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} else {
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Serial.printf("ID[%d] get firmware version failed, chain_status:%d \r\n",
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devices_list->devices[i].id, chain_status);
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}
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chain_status = M5Chain.setPIRDetectTriggerMode(devices_list->devices[i].id, CHAIN_DETECT_REPORT_MODE,
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&operation_status);
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if (chain_status == CHAIN_OK && operation_status) {
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Serial.printf("ID[%d] set pir detect trigger mode success\r\n", devices_list->devices[i].id);
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} else {
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Serial.printf(
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"ID[%d] set pir detect trigger mode failed, chain_status:%d operation_status:%d \r\n",
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devices_list->devices[i].id, chain_status, operation_status);
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}
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uint8_t saveToFlash = CHAIN_SAVE_FLASH_DISABLE;
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chain_status = M5Chain.setPIRComeTriggerKeepSeconds(devices_list->devices[i].id, keep_seconds,
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&operation_status, saveToFlash);
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if (chain_status == CHAIN_OK && operation_status) {
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Serial.printf(
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"ID[%d] set pir person-come trigger keep seconds success, keep %us, operate_status: %u\r\n",
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devices_list->devices[i].id, keep_seconds, operation_status);
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} else {
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Serial.printf(
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"ID[%d] set pir person-come trigger keep seconds failed, chain_status:%d "
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"operation_status:%d\r\n",
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devices_list->devices[i].id, chain_status, operation_status);
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}
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chain_status = M5Chain.getPIRComeTriggerKeepSeconds(devices_list->devices[i].id, &keep_seconds);
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if (chain_status == CHAIN_OK) {
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Serial.printf("ID[%d] get pir person-come trigger keep seconds success, keep %us\r\n",
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devices_list->devices[i].id, keep_seconds);
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} else {
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Serial.printf("ID[%d] get pir person-come trigger keep seconds failed, chain_status:%d\r\n",
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devices_list->devices[i].id, chain_status);
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}
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}
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}
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} else {
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Serial.println("devices list is NULL");
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}
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}
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void loop()
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{
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if (devices_list) {
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for (uint8_t i = 0; i < devices_list->count; i++) {
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if (devices_list->devices[i].device_type == CHAIN_PIR_TYPE_CODE) {
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chain_detect_mode_t pir_detect_report_mode;
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pir_detect_result_t pir_detect_res;
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pir_detect_report_t pir_detect_report_res;
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chain_status = M5Chain.getPIRDetectTriggerMode(devices_list->devices[i].id, &pir_detect_report_mode);
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if (chain_status == CHAIN_OK) {
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Serial.printf("Switch ID[%d] pir detect_trigger mode:%d \r\n", devices_list->devices[i].id,
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pir_detect_report_mode);
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} else {
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Serial.printf("Switch ID[%d] get pir_detect_trigger_mode failed, chain_status:%d \r\n",
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devices_list->devices[i].id, chain_status);
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}
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chain_status = M5Chain.getIRStatus(devices_list->devices[i].id, &pir_detect_res);
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if (chain_status == CHAIN_OK) {
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Serial.printf("PIR ID[%d] detect result is: %d\r\n", devices_list->devices[i].id, pir_detect_res);
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} else {
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Serial.printf("PIR ID[%d] get ir status failed, chain_status:%d \r\n", devices_list->devices[i].id,
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chain_status);
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}
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while (M5Chain.getPIRDetectTrigger(devices_list->devices[i].id, &pir_detect_report_res)) {
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switch (pir_detect_report_res) {
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case CHAIN_PIR_REPORT_PERSON_LEAVE:
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Serial.printf("ENCODER ID[%d] detect result is: non person \r\n",
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devices_list->devices[i].id);
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break;
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case CHAIN_PIR_REPORT_PERSON_COME:
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Serial.printf("ENCODER ID[%d] detect result is: have person \r\n",
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devices_list->devices[i].id);
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break;
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default:
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Serial.printf("ENCODER ID[%d] detect result is: unknown , pir_detect_res:%04x\r\n",
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devices_list->devices[i].id, pir_detect_res);
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break;
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}
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}
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}
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}
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}
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delay(500);
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}

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