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255
Core/Bsp/bsp_cmd.c
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255
Core/Bsp/bsp_cmd.c
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/**
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* @file bsp_cmd.c
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* @brief JSON command parser - receives JSON, executes command, returns JSON via UART1
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*/
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#include "bsp_cmd.h"
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#include "bsp_relay.h"
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#include "bsp_uart.h"
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#include "bsp_flash.h"
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#include "cJSON.h"
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#include <string.h>
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#include <stdio.h>
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/**
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* @brief Send JSON response via UART1
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*/
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static void send_response(cJSON *root)
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{
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char *json_str = cJSON_PrintUnformatted(root);
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if (json_str != NULL)
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{
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BSP_UART1_SendString(json_str);
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BSP_UART1_SendString("\r\n");
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cJSON_free(json_str);
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}
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cJSON_Delete(root);
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}
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/**
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* @brief Make a simple {"status":"ok","msg":"xxx"} response
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*/
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static void respond_ok(const char *msg)
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{
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cJSON *root = cJSON_CreateObject();
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cJSON_AddStringToObject(root, "status", "ok");
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cJSON_AddStringToObject(root, "msg", msg);
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send_response(root);
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}
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/**
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* @brief Make a {"status":"error","msg":"xxx"} response
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*/
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static void respond_error(const char *msg)
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{
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cJSON *root = cJSON_CreateObject();
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cJSON_AddStringToObject(root, "status", "error");
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cJSON_AddStringToObject(root, "msg", msg);
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send_response(root);
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}
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/**
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* @brief Process JSON command
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*
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* Supported commands:
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* {"cmd":"status"}
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* {"cmd":"fan_mode","value":"auto"} or "manual"
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* {"cmd":"fan_threshold","value":30.0}
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* {"cmd":"fan","value":"on"} or "off"
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* {"cmd":"light","value":"on"} or "off"
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* {"cmd":"reset"}
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*/
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void BSP_Cmd_ProcessJSON(const uint8_t *buf, uint16_t len)
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{
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cJSON *root = NULL;
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cJSON *cmd_item = NULL;
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cJSON *val_item = NULL;
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if (buf == NULL || len == 0)
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{
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respond_error("empty input");
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return;
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}
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/* Ensure null termination and strip non-JSON prefix/suffix */
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char tmp[256];
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if (len >= sizeof(tmp))
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len = sizeof(tmp) - 1;
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memcpy(tmp, buf, len);
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tmp[len] = '\0';
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/* Find the first '{' to skip any MQTT topic prefix */
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char *json_start = strchr(tmp, '{');
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if (json_start == NULL)
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{
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respond_error("no json found");
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return;
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}
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/* Find matching '}' to trim trailing garbage */
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char *json_end = json_start;
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int depth = 0;
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while (*json_end != '\0')
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{
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if (*json_end == '{') depth++;
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else if (*json_end == '}') depth--;
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if (depth == 0) { json_end++; break; }
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json_end++;
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}
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*json_end = '\0';
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/* Parse JSON */
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root = cJSON_Parse(json_start);
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if (root == NULL)
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{
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respond_error("invalid json");
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return;
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}
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/* Get "cmd" field */
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cmd_item = cJSON_GetObjectItemCaseSensitive(root, "cmd");
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if (cmd_item == NULL || !cJSON_IsString(cmd_item))
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{
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respond_error("missing cmd field");
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cJSON_Delete(root);
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return;
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}
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const char *cmd = cmd_item->valuestring;
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/* Get "value" field (optional) */
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val_item = cJSON_GetObjectItemCaseSensitive(root, "value");
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/* --- STATUS --- */
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if (strcasecmp(cmd, "status") == 0)
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{
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system_state_t state;
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BSP_System_GetState(&state);
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cJSON *resp = cJSON_CreateObject();
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cJSON_AddStringToObject(resp, "status", "ok");
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cJSON *data = cJSON_CreateObject();
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cJSON_AddStringToObject(data, "fan_mode", state.fan_mode == FAN_MODE_AUTO ? "auto" : "manual");
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cJSON_AddNumberToObject(data, "fan_threshold", state.fan_threshold);
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cJSON_AddStringToObject(data, "fan", state.fan_state ? "on" : "off");
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cJSON_AddStringToObject(data, "light", state.light_state ? "on" : "off");
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cJSON_AddItemToObject(resp, "data", data);
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send_response(resp);
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}
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/* --- FAN MODE --- */
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else if (strcasecmp(cmd, "fan_mode") == 0)
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{
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if (val_item == NULL || !cJSON_IsString(val_item))
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{
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respond_error("missing value");
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}
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else
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{
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const char *val = val_item->valuestring;
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if (strcasecmp(val, "auto") == 0)
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{
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BSP_FAN_SetMode(FAN_MODE_AUTO);
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respond_ok("fan mode set to auto");
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}
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else if (strcasecmp(val, "manual") == 0)
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{
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BSP_FAN_SetMode(FAN_MODE_MANUAL);
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respond_ok("fan mode set to manual");
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}
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else
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{
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respond_error("invalid fan_mode value");
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}
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}
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}
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/* --- FAN THRESHOLD --- */
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else if (strcasecmp(cmd, "fan_threshold") == 0)
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{
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if (val_item == NULL || !cJSON_IsNumber(val_item))
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{
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respond_error("missing or invalid value");
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}
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else
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{
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float thresh = (float)val_item->valuedouble;
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if (thresh > 0 && thresh < 100)
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{
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BSP_FAN_SetThreshold(thresh);
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respond_ok("fan threshold updated");
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}
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else
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{
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respond_error("threshold out of range");
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}
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}
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}
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/* --- FAN ON/OFF --- */
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else if (strcasecmp(cmd, "fan") == 0)
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{
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if (val_item == NULL || !cJSON_IsString(val_item))
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{
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respond_error("missing value");
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}
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else
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{
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const char *val = val_item->valuestring;
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if (strcasecmp(val, "on") == 0)
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{
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BSP_FAN_SetMode(FAN_MODE_MANUAL);
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BSP_FAN_On();
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respond_ok("fan on");
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}
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else if (strcasecmp(val, "off") == 0)
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{
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BSP_FAN_SetMode(FAN_MODE_MANUAL);
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BSP_FAN_Off();
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respond_ok("fan off");
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}
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else
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{
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respond_error("invalid fan value");
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}
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}
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}
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/* --- LIGHT ON/OFF --- */
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else if (strcasecmp(cmd, "light") == 0)
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{
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if (val_item == NULL || !cJSON_IsString(val_item))
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{
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respond_error("missing value");
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}
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else
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{
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const char *val = val_item->valuestring;
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if (strcasecmp(val, "on") == 0)
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{
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BSP_LIGHT_On();
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respond_ok("light on");
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}
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else if (strcasecmp(val, "off") == 0)
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{
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BSP_LIGHT_Off();
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respond_ok("light off");
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}
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else
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{
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respond_error("invalid light value");
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}
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}
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}
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/* --- RESET --- */
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else if (strcasecmp(cmd, "reset") == 0)
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{
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BSP_Flash_ResetSettings();
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respond_ok("settings reset to default");
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}
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/* --- UNKNOWN --- */
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else
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{
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respond_error("unknown command");
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}
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cJSON_Delete(root);
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}
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