diff --git a/src/modules/Telemetry/EnvironmentTelemetry.cpp b/src/modules/Telemetry/EnvironmentTelemetry.cpp
index 008da5c71..e72b03bd4 100644
--- a/src/modules/Telemetry/EnvironmentTelemetry.cpp
+++ b/src/modules/Telemetry/EnvironmentTelemetry.cpp
@@ -64,6 +64,10 @@ CGRadSensSensor cgRadSens;
 #include "Sensor/T1000xSensor.h"
 T1000xSensor t1000xSensor;
 #endif
+#ifdef SENSECAP_INDICATOR
+#include "Sensor/IndicatorSensor.h"
+IndicatorSensor indicatorSensor;
+#endif
 #define FAILED_STATE_SENSOR_READ_MULTIPLIER 10
 #define DISPLAY_RECEIVEID_MEASUREMENTS_ON_SCREEN true
 
@@ -103,6 +107,9 @@ int32_t EnvironmentTelemetryModule::runOnce()
             LOG_INFO("Environment Telemetry: init");
             // it's possible to have this module enabled, only for displaying values on the screen.
             // therefore, we should only enable the sensor loop if measurement is also enabled
+#ifdef SENSECAP_INDICATOR
+            result = indicatorSensor.runOnce();
+#endif
 #ifdef T1000X_SENSOR_EN
             result = t1000xSensor.runOnce();
 #elif !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR_EXTERNAL
@@ -298,6 +305,10 @@ bool EnvironmentTelemetryModule::getEnvironmentTelemetry(meshtastic_Telemetry *m
     m->which_variant = meshtastic_Telemetry_environment_metrics_tag;
     m->variant.environment_metrics = meshtastic_EnvironmentMetrics_init_zero;
 
+#ifdef SENSECAP_INDICATOR
+    valid = valid && indicatorSensor.getMetrics(m);
+    hasSensor = true;
+#endif
 #ifdef T1000X_SENSOR_EN // add by WayenWeng
     valid = valid && t1000xSensor.getMetrics(m);
     hasSensor = true;
@@ -410,7 +421,6 @@ bool EnvironmentTelemetryModule::getEnvironmentTelemetry(meshtastic_Telemetry *m
         valid = valid && cgRadSens.getMetrics(m);
         hasSensor = true;
     }
-
 #endif
     return valid && hasSensor;
 }
diff --git a/src/modules/Telemetry/Sensor/IndicatorSensor.cpp b/src/modules/Telemetry/Sensor/IndicatorSensor.cpp
new file mode 100644
index 000000000..f3dcd1727
--- /dev/null
+++ b/src/modules/Telemetry/Sensor/IndicatorSensor.cpp
@@ -0,0 +1,167 @@
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && defined(SENSECAP_INDICATOR)
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "IndicatorSensor.h"
+#include "TelemetrySensor.h"
+#include "serialization/cobs.h"
+#include <Adafruit_Sensor.h>
+#include <driver/uart.h>
+
+IndicatorSensor::IndicatorSensor() : TelemetrySensor(meshtastic_TelemetrySensorType_SENSOR_UNSET, "Indicator") {}
+
+#define SENSOR_BUF_SIZE (512)
+
+uint8_t buf[SENSOR_BUF_SIZE];  // recv
+uint8_t data[SENSOR_BUF_SIZE]; // decode
+
+#define ACK_PKT_PARA "ACK"
+
+enum sensor_pkt_type {
+    PKT_TYPE_ACK = 0x00,                  // uin32_t
+    PKT_TYPE_CMD_COLLECT_INTERVAL = 0xA0, // uin32_t
+    PKT_TYPE_CMD_BEEP_ON = 0xA1,          // uin32_t  ms: on time
+    PKT_TYPE_CMD_BEEP_OFF = 0xA2,
+    PKT_TYPE_CMD_SHUTDOWN = 0xA3, // uin32_t
+    PKT_TYPE_CMD_POWER_ON = 0xA4,
+    PKT_TYPE_SENSOR_SCD41_TEMP = 0xB0,     // float
+    PKT_TYPE_SENSOR_SCD41_HUMIDITY = 0xB1, // float
+    PKT_TYPE_SENSOR_SCD41_CO2 = 0xB2,      // float
+    PKT_TYPE_SENSOR_AHT20_TEMP = 0xB3,     // float
+    PKT_TYPE_SENSOR_AHT20_HUMIDITY = 0xB4, // float
+    PKT_TYPE_SENSOR_TVOC_INDEX = 0xB5,     // float
+};
+
+static int cmd_send(uint8_t cmd, const char *p_data, uint8_t len)
+{
+    uint8_t buf[32] = {0};
+    uint8_t data[32] = {0};
+
+    if (len > 31) {
+        return -1;
+    }
+
+    uint8_t index = 1;
+
+    data[0] = cmd;
+
+    if (len > 0 && p_data != NULL) {
+        memcpy(&data[1], p_data, len);
+        index += len;
+    }
+    cobs_encode_result ret = cobs_encode(buf, sizeof(buf), data, index);
+
+    // LOG_DEBUG("cobs TX status:%d, len:%d, type 0x%x", ret.status, ret.out_len, cmd);
+
+    if (ret.status == COBS_ENCODE_OK) {
+        return uart_write_bytes(SENSOR_PORT_NUM, buf, ret.out_len + 1);
+    }
+
+    return -1;
+}
+
+int32_t IndicatorSensor::runOnce()
+{
+    LOG_INFO("%s: init", sensorName);
+    setup();
+    return 2 * DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS; // give it some time to start up
+}
+
+void IndicatorSensor::setup()
+{
+    uart_config_t uart_config = {
+        .baud_rate = SENSOR_BAUD_RATE,
+        .data_bits = UART_DATA_8_BITS,
+        .parity = UART_PARITY_DISABLE,
+        .stop_bits = UART_STOP_BITS_1,
+        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
+        .source_clk = UART_SCLK_APB,
+    };
+    int intr_alloc_flags = 0;
+    char buffer[11];
+
+    uart_driver_install(SENSOR_PORT_NUM, SENSOR_BUF_SIZE * 2, 0, 0, NULL, intr_alloc_flags);
+    uart_param_config(SENSOR_PORT_NUM, &uart_config);
+    uart_set_pin(SENSOR_PORT_NUM, SENSOR_RP2040_TXD, SENSOR_RP2040_RXD, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
+    cmd_send(PKT_TYPE_CMD_POWER_ON, NULL, 0);
+    // measure and send only once every minute, for the phone API
+    const char *interval = ultoa(60000, buffer, 10);
+    cmd_send(PKT_TYPE_CMD_COLLECT_INTERVAL, interval, strlen(interval) + 1);
+}
+
+bool IndicatorSensor::getMetrics(meshtastic_Telemetry *measurement)
+{
+    cobs_decode_result ret;
+    int len = uart_read_bytes(SENSOR_PORT_NUM, buf, (SENSOR_BUF_SIZE - 1), 100 / portTICK_PERIOD_MS);
+
+    float value = 0.0;
+    uint8_t pkt_type = 0;
+    uint8_t *p_buf_start = buf;
+    uint8_t *p_buf_end = buf;
+    if (len > 0) {
+        while (p_buf_start < (buf + len)) {
+            p_buf_end = p_buf_start;
+            while (p_buf_end < (buf + len)) {
+                if (*p_buf_end == 0x00) {
+                    break;
+                }
+                p_buf_end++;
+            }
+            // decode buf
+            memset(data, 0, sizeof(data));
+            ret = cobs_decode(data, sizeof(data), p_buf_start, p_buf_end - p_buf_start);
+
+            // LOG_DEBUG("cobs RX status:%d, len:%d, type:0x%x  ", ret.status, ret.out_len, data[0]);
+
+            if (ret.out_len > 1 && ret.status == COBS_DECODE_OK) {
+
+                value = 0.0;
+                pkt_type = data[0];
+                switch (pkt_type) {
+                case PKT_TYPE_SENSOR_SCD41_CO2: {
+                    memcpy(&value, &data[1], sizeof(value));
+                    // LOG_DEBUG("CO2: %.1f", value);
+                    cmd_send(PKT_TYPE_ACK, ACK_PKT_PARA, 4);
+                    break;
+                }
+
+                case PKT_TYPE_SENSOR_AHT20_TEMP: {
+                    memcpy(&value, &data[1], sizeof(value));
+                    // LOG_DEBUG("Temp: %.1f", value);
+                    cmd_send(PKT_TYPE_ACK, ACK_PKT_PARA, 4);
+                    measurement->variant.environment_metrics.has_temperature = true;
+                    measurement->variant.environment_metrics.temperature = value;
+                    break;
+                }
+
+                case PKT_TYPE_SENSOR_AHT20_HUMIDITY: {
+                    memcpy(&value, &data[1], sizeof(value));
+                    // LOG_DEBUG("Humidity: %.1f", value);
+                    cmd_send(PKT_TYPE_ACK, ACK_PKT_PARA, 4);
+                    measurement->variant.environment_metrics.has_relative_humidity = true;
+                    measurement->variant.environment_metrics.relative_humidity = value;
+                    break;
+                }
+
+                case PKT_TYPE_SENSOR_TVOC_INDEX: {
+                    memcpy(&value, &data[1], sizeof(value));
+                    // LOG_DEBUG("Tvoc: %.1f", value);
+                    cmd_send(PKT_TYPE_ACK, ACK_PKT_PARA, 4);
+                    measurement->variant.environment_metrics.has_iaq = true;
+                    measurement->variant.environment_metrics.iaq = value;
+                    break;
+                }
+                default:
+                    break;
+                }
+            }
+
+            p_buf_start = p_buf_end + 1; // next message
+        }
+        return true;
+    }
+    return false;
+}
+
+#endif
\ No newline at end of file
diff --git a/src/modules/Telemetry/Sensor/IndicatorSensor.h b/src/modules/Telemetry/Sensor/IndicatorSensor.h
new file mode 100644
index 000000000..48ecef8de
--- /dev/null
+++ b/src/modules/Telemetry/Sensor/IndicatorSensor.h
@@ -0,0 +1,19 @@
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "TelemetrySensor.h"
+
+class IndicatorSensor : public TelemetrySensor
+{
+  protected:
+    virtual void setup() override;
+
+  public:
+    IndicatorSensor();
+    virtual int32_t runOnce() override;
+    virtual bool getMetrics(meshtastic_Telemetry *measurement) override;
+};
+
+#endif
\ No newline at end of file
diff --git a/src/serialization/cobs.cpp b/src/serialization/cobs.cpp
new file mode 100644
index 000000000..39ea019fd
--- /dev/null
+++ b/src/serialization/cobs.cpp
@@ -0,0 +1,131 @@
+#include "cobs.h"
+#include <stdlib.h>
+
+#ifdef SENSECAP_INDICATOR
+
+cobs_encode_result cobs_encode(uint8_t *dst_buf_ptr, size_t dst_buf_len, const uint8_t *src_ptr, size_t src_len)
+{
+    cobs_encode_result result = {0, COBS_ENCODE_OK};
+    const uint8_t *src_read_ptr = src_ptr;
+    const uint8_t *src_end_ptr = src_read_ptr + src_len;
+    uint8_t *dst_buf_start_ptr = dst_buf_ptr;
+    uint8_t *dst_buf_end_ptr = dst_buf_start_ptr + dst_buf_len;
+    uint8_t *dst_code_write_ptr = dst_buf_ptr;
+    uint8_t *dst_write_ptr = dst_code_write_ptr + 1;
+    uint8_t src_byte = 0;
+    uint8_t search_len = 1;
+
+    if ((dst_buf_ptr == NULL) || (src_ptr == NULL)) {
+        result.status = COBS_ENCODE_NULL_POINTER;
+        return result;
+    }
+
+    if (src_len != 0) {
+        for (;;) {
+            if (dst_write_ptr >= dst_buf_end_ptr) {
+                result.status = (cobs_encode_status)(result.status | (cobs_encode_status)COBS_ENCODE_OUT_BUFFER_OVERFLOW);
+                break;
+            }
+
+            src_byte = *src_read_ptr++;
+            if (src_byte == 0) {
+                *dst_code_write_ptr = search_len;
+                dst_code_write_ptr = dst_write_ptr++;
+                search_len = 1;
+                if (src_read_ptr >= src_end_ptr) {
+                    break;
+                }
+            } else {
+                *dst_write_ptr++ = src_byte;
+                search_len++;
+                if (src_read_ptr >= src_end_ptr) {
+                    break;
+                }
+                if (search_len == 0xFF) {
+                    *dst_code_write_ptr = search_len;
+                    dst_code_write_ptr = dst_write_ptr++;
+                    search_len = 1;
+                }
+            }
+        }
+    }
+
+    if (dst_code_write_ptr >= dst_buf_end_ptr) {
+        result.status = (cobs_encode_status)(result.status | (cobs_encode_status)COBS_ENCODE_OUT_BUFFER_OVERFLOW);
+        dst_write_ptr = dst_buf_end_ptr;
+    } else {
+        *dst_code_write_ptr = search_len;
+    }
+
+    result.out_len = dst_write_ptr - dst_buf_start_ptr;
+
+    return result;
+}
+
+cobs_decode_result cobs_decode(uint8_t *dst_buf_ptr, size_t dst_buf_len, const uint8_t *src_ptr, size_t src_len)
+{
+    cobs_decode_result result = {0, COBS_DECODE_OK};
+    const uint8_t *src_read_ptr = src_ptr;
+    const uint8_t *src_end_ptr = src_read_ptr + src_len;
+    uint8_t *dst_buf_start_ptr = dst_buf_ptr;
+    uint8_t *dst_buf_end_ptr = dst_buf_start_ptr + dst_buf_len;
+    uint8_t *dst_write_ptr = dst_buf_ptr;
+    size_t remaining_bytes;
+    uint8_t src_byte;
+    uint8_t i;
+    uint8_t len_code;
+
+    if ((dst_buf_ptr == NULL) || (src_ptr == NULL)) {
+        result.status = COBS_DECODE_NULL_POINTER;
+        return result;
+    }
+
+    if (src_len != 0) {
+        for (;;) {
+            len_code = *src_read_ptr++;
+            if (len_code == 0) {
+                result.status = (cobs_decode_status)(result.status | (cobs_decode_status)COBS_DECODE_ZERO_BYTE_IN_INPUT);
+                break;
+            }
+            len_code--;
+
+            remaining_bytes = src_end_ptr - src_read_ptr;
+            if (len_code > remaining_bytes) {
+                result.status = (cobs_decode_status)(result.status | (cobs_decode_status)COBS_DECODE_INPUT_TOO_SHORT);
+                len_code = remaining_bytes;
+            }
+
+            remaining_bytes = dst_buf_end_ptr - dst_write_ptr;
+            if (len_code > remaining_bytes) {
+                result.status = (cobs_decode_status)(result.status | (cobs_decode_status)COBS_DECODE_OUT_BUFFER_OVERFLOW);
+                len_code = remaining_bytes;
+            }
+
+            for (i = len_code; i != 0; i--) {
+                src_byte = *src_read_ptr++;
+                if (src_byte == 0) {
+                    result.status = (cobs_decode_status)(result.status | (cobs_decode_status)COBS_DECODE_ZERO_BYTE_IN_INPUT);
+                }
+                *dst_write_ptr++ = src_byte;
+            }
+
+            if (src_read_ptr >= src_end_ptr) {
+                break;
+            }
+
+            if (len_code != 0xFE) {
+                if (dst_write_ptr >= dst_buf_end_ptr) {
+                    result.status = (cobs_decode_status)(result.status | (cobs_decode_status)COBS_DECODE_OUT_BUFFER_OVERFLOW);
+                    break;
+                }
+                *dst_write_ptr++ = 0;
+            }
+        }
+    }
+
+    result.out_len = dst_write_ptr - dst_buf_start_ptr;
+
+    return result;
+}
+
+#endif
\ No newline at end of file
diff --git a/src/serialization/cobs.h b/src/serialization/cobs.h
new file mode 100644
index 000000000..f95e61f62
--- /dev/null
+++ b/src/serialization/cobs.h
@@ -0,0 +1,75 @@
+#ifndef COBS_H_
+#define COBS_H_
+
+#include "configuration.h"
+
+#ifdef SENSECAP_INDICATOR
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#define COBS_ENCODE_DST_BUF_LEN_MAX(SRC_LEN) ((SRC_LEN) + (((SRC_LEN) + 253u) / 254u))
+#define COBS_DECODE_DST_BUF_LEN_MAX(SRC_LEN) (((SRC_LEN) == 0) ? 0u : ((SRC_LEN)-1u))
+#define COBS_ENCODE_SRC_OFFSET(SRC_LEN) (((SRC_LEN) + 253u) / 254u)
+
+typedef enum {
+    COBS_ENCODE_OK = 0x00,
+    COBS_ENCODE_NULL_POINTER = 0x01,
+    COBS_ENCODE_OUT_BUFFER_OVERFLOW = 0x02
+} cobs_encode_status;
+
+typedef struct {
+    size_t out_len;
+    cobs_encode_status status;
+} cobs_encode_result;
+
+typedef enum {
+    COBS_DECODE_OK = 0x00,
+    COBS_DECODE_NULL_POINTER = 0x01,
+    COBS_DECODE_OUT_BUFFER_OVERFLOW = 0x02,
+    COBS_DECODE_ZERO_BYTE_IN_INPUT = 0x04,
+    COBS_DECODE_INPUT_TOO_SHORT = 0x08
+} cobs_decode_status;
+
+typedef struct {
+    size_t out_len;
+    cobs_decode_status status;
+} cobs_decode_result;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* COBS-encode a string of input bytes.
+ *
+ * dst_buf_ptr:    The buffer into which the result will be written
+ * dst_buf_len:    Length of the buffer into which the result will be written
+ * src_ptr:        The byte string to be encoded
+ * src_len         Length of the byte string to be encoded
+ *
+ * returns:        A struct containing the success status of the encoding
+ *                 operation and the length of the result (that was written to
+ *                 dst_buf_ptr)
+ */
+cobs_encode_result cobs_encode(uint8_t *dst_buf_ptr, size_t dst_buf_len, const uint8_t *src_ptr, size_t src_len);
+
+/* Decode a COBS byte string.
+ *
+ * dst_buf_ptr:    The buffer into which the result will be written
+ * dst_buf_len:    Length of the buffer into which the result will be written
+ * src_ptr:        The byte string to be decoded
+ * src_len         Length of the byte string to be decoded
+ *
+ * returns:        A struct containing the success status of the decoding
+ *                 operation and the length of the result (that was written to
+ *                 dst_buf_ptr)
+ */
+cobs_decode_result cobs_decode(uint8_t *dst_buf_ptr, size_t dst_buf_len, const uint8_t *src_ptr, size_t src_len);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* SENSECAP_INDICATOR */
+
+#endif /* COBS_H_ */
diff --git a/variants/seeed-sensecap-indicator/variant.h b/variants/seeed-sensecap-indicator/variant.h
index 6028a3ffa..289fea55b 100644
--- a/variants/seeed-sensecap-indicator/variant.h
+++ b/variants/seeed-sensecap-indicator/variant.h
@@ -1,6 +1,12 @@
 #define I2C_SDA 39
 #define I2C_SCL 40
 
+// This board has a serial coprocessor for sensor readings
+#define SENSOR_RP2040_TXD 19
+#define SENSOR_RP2040_RXD 20
+#define SENSOR_PORT_NUM 2
+#define SENSOR_BAUD_RATE 115200
+
 #define BUTTON_PIN 38
 // #define BUTTON_NEED_PULLUP