Thu, 06 Apr 2023 20:53:06 +0200
Set the new measured deep sleep current consumption. This is half of the Wemos D1 system.
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1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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1 | /* |
1c9894662795
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2 | * Copyright (c) 2021 Ruslan V. Uss <unclerus@gmail.com> |
1c9894662795
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3 | * |
1c9894662795
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4 | * Redistribution and use in source and binary forms, with or without |
1c9894662795
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5 | * modification, are permitted provided that the following conditions are met: |
1c9894662795
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6 | * |
1c9894662795
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7 | * 1. Redistributions of source code must retain the above copyright notice, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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8 | * this list of conditions and the following disclaimer. |
1c9894662795
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9 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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10 | * this list of conditions and the following disclaimer in the documentation |
1c9894662795
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11 | * and/or other materials provided with the distribution. |
1c9894662795
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12 | * 3. Neither the name of the copyright holder nor the names of itscontributors |
1c9894662795
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13 | * may be used to endorse or promote products derived from this software without |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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14 | * specific prior written permission. |
1c9894662795
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15 | * |
1c9894662795
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
1c9894662795
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
1c9894662795
Added esp-idf-lib for a lot of sensors. Added the basic design for the BMP280 task.
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
1c9894662795
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19 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
1c9894662795
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20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
1c9894662795
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21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
1c9894662795
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22 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
1c9894662795
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23 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
1c9894662795
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24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
1c9894662795
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25 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
1c9894662795
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26 | */ |
1c9894662795
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27 | |
1c9894662795
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28 | /** |
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29 | * @file sht4x.h |
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30 | * @defgroup sht4x sht4x |
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31 | * @{ |
1c9894662795
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32 | * |
1c9894662795
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33 | * ESP-IDF driver for Sensirion SHT40/SHT41 digital temperature and humidity sensor |
1c9894662795
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34 | * |
1c9894662795
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35 | * Copyright (c) 2021 Ruslan V. Uss <unclerus@gmail.com> |
1c9894662795
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36 | * |
1c9894662795
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37 | * BSD Licensed as described in the file LICENSE |
1c9894662795
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38 | */ |
1c9894662795
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39 | #ifndef __SHT4X_H__ |
1c9894662795
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40 | #define __SHT4X_H__ |
1c9894662795
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41 | |
1c9894662795
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42 | #include <stdbool.h> |
1c9894662795
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43 | #include <i2cdev.h> |
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44 | #include <esp_err.h> |
1c9894662795
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45 | |
1c9894662795
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46 | #ifdef __cplusplus |
1c9894662795
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47 | extern "C" { |
1c9894662795
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48 | #endif |
1c9894662795
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49 | |
1c9894662795
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50 | #define SHT4X_I2C_ADDRESS 0x44 |
1c9894662795
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51 | |
1c9894662795
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52 | #define SHT4X_RAW_DATA_SIZE 6 |
1c9894662795
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53 | |
1c9894662795
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54 | typedef uint8_t sht4x_raw_data_t[SHT4X_RAW_DATA_SIZE]; |
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55 | |
1c9894662795
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56 | /** |
1c9894662795
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57 | * Possible heater modes |
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58 | */ |
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59 | typedef enum |
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60 | { |
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61 | SHT4X_HEATER_OFF = 0, /**< Heater is off, default */ |
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62 | SHT4X_HEATER_HIGH_LONG, /**< High power (~200mW), 1 second pulse */ |
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63 | SHT4X_HEATER_HIGH_SHORT, /**< High power (~200mW), 0.1 second pulse */ |
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64 | SHT4X_HEATER_MEDIUM_LONG, /**< Medium power (~110mW), 1 second pulse */ |
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65 | SHT4X_HEATER_MEDIUM_SHORT, /**< Medium power (~110mW), 0.1 second pulse */ |
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66 | SHT4X_HEATER_LOW_LONG, /**< Low power (~20mW), 1 second pulse */ |
1c9894662795
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67 | SHT4X_HEATER_LOW_SHORT, /**< Low power (~20mW), 0.1 second pulse */ |
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68 | } sht4x_heater_t; |
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69 | |
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70 | /** |
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71 | * Possible repeatability modes |
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72 | */ |
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73 | typedef enum |
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74 | { |
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75 | SHT4X_HIGH = 0, |
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76 | SHT4X_MEDIUM, |
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77 | SHT4X_LOW |
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78 | } sht4x_repeat_t; |
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79 | |
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80 | /** |
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81 | * Device descriptor |
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82 | */ |
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83 | typedef struct |
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84 | { |
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85 | i2c_dev_t i2c_dev; //!< I2C device descriptor |
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86 | |
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87 | uint32_t serial; //!< device serial number |
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88 | |
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89 | sht4x_heater_t heater; //!< used measurement mode |
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90 | sht4x_repeat_t repeatability; //!< used repeatability |
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91 | |
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92 | bool meas_started; //!< indicates whether measurement started |
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93 | uint64_t meas_start_time; //!< measurement start time in us |
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94 | } sht4x_t; |
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95 | |
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96 | /** |
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97 | * @brief Initialize device descriptor |
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98 | * |
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99 | * @param dev Device descriptor |
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100 | * @param port I2C port |
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101 | * @param sda_gpio SDA GPIO |
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102 | * @param scl_gpio SCL GPIO |
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103 | * @return `ESP_OK` on success |
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104 | */ |
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105 | esp_err_t sht4x_init_desc(sht4x_t *dev, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio); |
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106 | |
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107 | /** |
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108 | * @brief Free device descriptor |
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109 | * |
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110 | * @param dev Device descriptor |
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111 | * @return `ESP_OK` on success |
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112 | */ |
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113 | esp_err_t sht4x_free_desc(sht4x_t *dev); |
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114 | |
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115 | /** |
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116 | * @brief Initialize sensor |
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117 | * |
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118 | * @param dev Device descriptor |
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119 | * @return `ESP_OK` on success |
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120 | */ |
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121 | esp_err_t sht4x_init(sht4x_t *dev); |
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122 | |
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123 | /** |
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124 | * @brief Soft-reset sensor |
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125 | * |
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126 | * @param dev Device descriptor |
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127 | * @return `ESP_OK` on success |
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128 | */ |
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129 | esp_err_t sht4x_reset(sht4x_t *dev); |
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130 | |
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131 | /** |
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132 | * @brief High level measurement function |
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133 | * |
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134 | * For convenience this function comprises all three steps to perform |
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135 | * one measurement in only one function: |
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136 | * |
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137 | * 1. Starts a measurement |
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138 | * 2. Waits using `vTaskDelay()` until measurement results are available |
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139 | * 3. Returns the results in kind of floating point sensor values |
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140 | * |
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141 | * This function is the easiest way to use the sensor. It is most suitable |
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142 | * for users that don't want to have the control on sensor details. |
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143 | * |
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144 | * @note The function delays the calling task up to 1.1 s to wait for |
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145 | * the measurement results. This might lead to problems when the function |
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146 | * is called from a software timer callback function. |
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147 | * |
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148 | * @param dev Device descriptor |
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149 | * @param temperature Temperature in degree Celsius |
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150 | * @param humidity Humidity in percent |
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151 | * @return `ESP_OK` on success |
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152 | */ |
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153 | esp_err_t sht4x_measure(sht4x_t *dev, float *temperature, float *humidity); |
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154 | |
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155 | /** |
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156 | * @brief Start the measurement. |
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157 | * |
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158 | * @param dev Device descriptor |
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159 | * @return `ESP_OK` on success |
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160 | */ |
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161 | esp_err_t sht4x_start_measurement(sht4x_t *dev); |
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162 | |
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163 | /** |
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164 | * @brief Get the duration of a measurement in RTOS ticks. |
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165 | * |
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166 | * The function returns the duration in RTOS ticks required by the sensor to |
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167 | * perform a measurement for the given repeatability and heater setting. |
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168 | * Once a measurement is started with function ::sht4x_start_measurement() |
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169 | * the user task can use this duration in RTOS ticks directly to wait |
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170 | * with function `vTaskDelay()` until the measurement results can be fetched. |
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171 | * |
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172 | * @param dev Device descriptor |
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173 | * @return Measurement duration given in RTOS ticks |
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174 | */ |
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175 | size_t sht4x_get_measurement_duration(sht4x_t *dev); |
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176 | |
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177 | /** |
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178 | * @brief Read measurement results from sensor as raw data |
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179 | * |
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180 | * The function read measurement results from the sensor, checks the CRC |
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181 | * checksum and stores them in the byte array as following. |
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182 | * |
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183 | * data[0] = Temperature MSB |
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184 | * data[1] = Temperature LSB |
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185 | * data[2] = Temperature CRC |
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186 | * data[3] = Humidity MSB |
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187 | * data[4] = Humidity LSB |
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188 | * data[5] = Humidity CRC |
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189 | * |
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190 | * In case that there are no new data that can be read, the function fails. |
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191 | * |
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192 | * @param dev Device descriptor |
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193 | * @param[out] raw Byte array in which raw data are stored |
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194 | * @return `ESP_OK` on success |
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195 | */ |
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196 | esp_err_t sht4x_get_raw_data(sht4x_t *dev, sht4x_raw_data_t raw); |
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197 | |
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198 | /** |
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199 | * @brief Computes sensor values from raw data |
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200 | * |
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201 | * @param raw_data Byte array that contains raw data |
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202 | * @param[out] temperature Temperature in degree Celsius |
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203 | * @param[out] humidity Humidity in percent |
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204 | * @return `ESP_OK` on success |
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205 | */ |
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206 | esp_err_t sht4x_compute_values(sht4x_raw_data_t raw_data, float *temperature, float *humidity); |
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207 | |
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208 | /** |
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209 | * @brief Get measurement results in form of sensor values |
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210 | * |
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211 | * The function combines function ::sht4x_get_raw_data() and function |
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212 | * ::sht4x_compute_values() to get the measurement results. |
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213 | * |
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214 | * In case that there are no results that can be read, the function fails. |
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215 | * |
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216 | * @param dev Device descriptor |
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217 | * @param[out] temperature Temperature in degree Celsius |
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218 | * @param[out] humidity Humidity in percent |
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219 | * @return `ESP_OK` on success |
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220 | */ |
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221 | esp_err_t sht4x_get_results(sht4x_t *dev, float *temperature, float *humidity); |
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222 | |
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223 | #ifdef __cplusplus |
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224 | } |
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225 | #endif |
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226 | |
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227 | /**@}*/ |
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228 | |
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229 | #endif /* __SHT4X_H__ */ |