From b0e565d1800b2be582d19a500cffd6125d7c7894 Mon Sep 17 00:00:00 2001
From: Alexey Zholtikov <git@zh.com.ru>
Date: Sun, 5 Apr 2026 10:42:25 +0300
Subject: [PATCH] feat: added i2c frequency selection

---
 include/zh_aht.h | 2 ++
 version.txt      | 2 +-
 zh_aht.c         | 3 ++-
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/zh_aht.h b/include/zh_aht.h
index 05ab5c2..3c3872b 100644
--- a/include/zh_aht.h
+++ b/include/zh_aht.h
@@ -14,6 +14,7 @@
  */
 #define ZH_AHT_INIT_CONFIG_DEFAULT() \
     {                                \
+        .i2c_frequency = 400000,     \
         .i2c_address = 0x38}
 
 #ifdef __cplusplus
@@ -28,6 +29,7 @@ extern "C"
     {
         i2c_master_bus_handle_t i2c_handle; /*!< Unique I2C bus handle. */
         uint8_t i2c_address;                /*!< Sensor I2C address. */
+        uint32_t i2c_frequency;             /*!< Sensor I2C frequency. */
     } zh_aht_init_config_t;
 
     /**
diff --git a/version.txt b/version.txt
index 56fea8a..a0cd9f0 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-3.0.0
\ No newline at end of file
+3.1.0
\ No newline at end of file
diff --git a/zh_aht.c b/zh_aht.c
index 2525fd1..2b4fa8c 100644
--- a/zh_aht.c
+++ b/zh_aht.c
@@ -63,6 +63,7 @@ esp_err_t zh_aht_reset(zh_aht_handle_t *handle)
 static esp_err_t _zh_aht_validate_config(const zh_aht_init_config_t *config)
 {
     ZH_ERROR_CHECK(config->i2c_address == 0x38 || config->i2c_address == 0x39, ESP_ERR_INVALID_ARG, NULL, "Invalid I2C address.");
+    ZH_ERROR_CHECK(config->i2c_frequency <= 400000, ESP_ERR_INVALID_ARG, NULL, "Invalid I2C frequency.");
     ZH_ERROR_CHECK(config->i2c_handle != NULL, ESP_ERR_INVALID_ARG, NULL, "Invalid I2C handle.");
     return ESP_OK;
 }
@@ -72,7 +73,7 @@ static esp_err_t _zh_aht_i2c_init(const zh_aht_init_config_t *config, zh_aht_han
     i2c_device_config_t aht_config = {
         .dev_addr_length = I2C_ADDR_BIT_LEN_7,
         .device_address = config->i2c_address,
-        .scl_speed_hz = 100000,
+        .scl_speed_hz = config->i2c_frequency,
     };
     i2c_master_dev_handle_t _dev_handle = NULL;
     ZH_ERROR_CHECK(i2c_master_bus_add_device(config->i2c_handle, &aht_config, &_dev_handle) == ESP_OK, ESP_FAIL, NULL, "Add I2C device failed.");