diff --git a/CMakeLists.txt b/CMakeLists.txt
index 599d191..c344cbe 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -77,6 +77,8 @@ zadd_executable(
   ./app/
   SRC
   ${VAR_APP_SOURCE}
+  h2o2_computer/zh2o2_computer.c
+
   LINK_DIRECTORIES
   libs/libixwebsocket/lib
   LINK_LIBRARIES
diff --git a/README.md b/README.md
index d621a09..09eb8c9 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,12 @@
 # README
 
 ```
+    V2.2
+        1.添加H2O2-RS计算算法
+
+```
+
+```
 1. 输入rootiflytop9973可以进入超级用户
 2. ws测试地址: ws://192.168.8.10:19000
 ```
diff --git a/h2o2_computer/zh2o2_computer.c b/h2o2_computer/zh2o2_computer.c
index 4571629..52e45f8 100644
--- a/h2o2_computer/zh2o2_computer.c
+++ b/h2o2_computer/zh2o2_computer.c
@@ -193,6 +193,15 @@ int zh2o2_computer_self_test() {
   ZCHECK_EQ(zh2o2_compute_pms(500, t2k(20), 101325), 1063.920083, 0.01);
   ZCHECK_EQ(zh2o2_compute_rs(500, t2k(20), 42, 101325), 92.345718, 0.01);
 
+  float temperatureC = 20;
+  float AirPressure  = 101325;
+  float rh           = 50;
+  printf("T  AirPressure RH  H2O2(ppm)  RS\n");
+  for (size_t i = 0; i < 500; i += 50) {
+    float rs = zh2o2_compute_rs(i, zh2o2_t2k(temperatureC), rh, AirPressure);
+    printf("%d %d %d %d %d\n", (int) temperatureC, (int)AirPressure,  (int)rh, (int) i,  (int)rs);
+  }
+
   printf("Test passed\n");
   return 0;
 }
\ No newline at end of file
diff --git a/h2o2_computer/zh2o2_computer.h b/h2o2_computer/zh2o2_computer.h
index 0b74636..22b1375 100644
--- a/h2o2_computer/zh2o2_computer.h
+++ b/h2o2_computer/zh2o2_computer.h
@@ -1,8 +1,16 @@
 #pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <math.h>
 #include <stdbool.h>
 #include <stdint.h>
 
+//https://iflytop1.feishu.cn/wiki/QvXow7g6aiI1kskUVwQcRL1BnXd
+
+#define AIR_PRESSURE 101325.0
 
 /**
  * @brief 计算 water vapor saturation pressure  in an H2O2 vapor environment
@@ -31,5 +39,8 @@ double zh2o2_compute_rs(double ppm, double Tk, double rh100, double AirPressure)
  */
 double zh2o2_t2k(double temperatureC);
 
+int zh2o2_computer_self_test();
 
-int zh2o2_computer_self_test();
\ No newline at end of file
+#ifdef __cplusplus
+}
+#endif
\ No newline at end of file
diff --git a/src/service/device_io_control_service.cpp b/src/service/device_io_control_service.cpp
index 4aa78e7..f1207e3 100644
--- a/src/service/device_io_control_service.cpp
+++ b/src/service/device_io_control_service.cpp
@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "h2o2_computer/zh2o2_computer.h"
 #include "iflytop/components/uart_printer/uart_printer.hpp"
 #include "iflytoplinuxsdk/src/iflytop/components/ziconv.hpp"
 
@@ -280,7 +281,7 @@ void DeviceIoControlService::H2O2Sensor_updateSensorData(int32_t sensorid, repor
     sensor_data->humid      = data->humid / 10;
     sensor_data->saturation = data->saturation / 10;
     if (sensor_data->saturation == 0) {
-      sensor_data->saturation = sensor_data->humid - 3;
+      sensor_data->saturation = zh2o2_compute_rs(data->h2o2, zh2o2_t2k(data->temp), data->humid, AIR_PRESSURE);
     }
     sensor_data->sensorId   = data->sensorid;
     sensor_data->updatetime = zsys_get_ticket();
diff --git a/src/version.hpp b/src/version.hpp
index 18d1017..c681d56 100644
--- a/src/version.hpp
+++ b/src/version.hpp
@@ -1,2 +1,2 @@
 #pragma once
-#define VERSION "2.1"
\ No newline at end of file
+#define VERSION "2.2"
\ No newline at end of file