Update documentation and fix small issues.

src/esp_dht22/README.md

@@ -8,6 +8,5 @@ Before you can get the temperature and humidity from DHT22 you have to call
 `esp_dht22_init`. You need to call it only once unless you change the GPIO
 pin setup somewhere else in your code.
 
-
-See driver documentation in [esp_dht22.h](include/esp_dht22.h) header file 
-for more details.
+See [example program](../../examples/dht22) and driver documentation 
+in [esp_dht22.h](include/esp_dht22.h) header file for more details.

src/esp_dht22/esp_dht22.c

@@ -14,16 +14,17 @@
  * under the License.
  */
 
+
 #include <esp_dht22.h>
 #include <esp_gpio.h>
 #include <mem.h>
 #include <user_interface.h>
 
 #define BUS_LOW(gpio_num) (GPIO_OUT_EN_S = (0x1 << (gpio_num)))
-#define BUS_HIGH(gpio_num) (GPIO_OUT_EN_C = (0x1 << (gpio_num)))
 #define BUS_RELEASE(gpio_num) (GPIO_OUT_EN_C = (0x1 << (gpio_num)))
 #define BUS_READ(gpio_num) ((GPIO_IN & (0x1 << (gpio_num))) != 0)
 
+
 /**
  * Measure number of 10us slots the state was kept.
  *

src/esp_dht22/include/esp_dht22.h

@@ -14,6 +14,7 @@
  * under the License.
  */
 
+
 #ifndef ESP_DHT22_H
 #define ESP_DHT22_H
 
@@ -40,6 +41,7 @@ typedef enum {
 void ets_isr_mask(unsigned intr);
 void ets_isr_unmask(unsigned intr);
 
+
 /**
  * Initialize DHT22.
  *

src/esp_ds18b20/README.md

@@ -18,7 +18,7 @@ anymore.
 Most of the operations with the DS18B20 library is based on passing pointers 
 to the `esp_ow_device` structure which has pointer to `esp_ds18b20_st` 
 status structure. The `esp_ds18b20_st` keeps track of last scratch pad read
-the last temperature conversion.
+and last temperature conversion.
 
 ```
 esp_ow_device *device;
@@ -34,12 +34,11 @@ esp_ow_dev *device = esp_ds18b20_new_dev(rom);
 
 ``` 
 
-With DS18B20 temperature measurement takes between 94 and 750ms depending 
-on resolution. You don't want to block the CPU for that long waiting for 
-example using some kind of delay. That's why library is using event bus 
-(esp_eb) to emmit events when the temperature conversion is ready to read.
-Check [example program](../../examples/ds18b20_temp) to see how it should be 
-done.   
+Temperature measurement with DS18B20 takes between 94 and 750ms depending 
+on resolution. You don't want to block the CPU for that long using some kind 
+of delay. That's why library is using event bus (esp_eb) to emmit events when 
+the temperature conversion is ready.
 
-See driver documentation in [esp_ds18b20.h](include/esp_ds18b20.h) header file 
-for more details.
+Check [example program](../../examples/ds18b20_temp) to see how it should be 
+done and driver documentation in [esp_ds18b20.h](include/esp_ds18b20.h) 
+header file for more details.

src/esp_ds18b20/esp_ds18b20.c

@@ -217,10 +217,15 @@ esp_ds18b20_search(uint8_t gpio_num, bool in_alert, esp_ow_device **list)
 esp_ow_device *ICACHE_FLASH_ATTR
 esp_ds18b20_new_dev(uint8_t *rom)
 {
-  esp_ow_device *device = os_zalloc(sizeof(esp_ow_device));
-  esp_ds18b20_st *st = os_zalloc(sizeof(esp_ds18b20_st));
+  esp_ow_device *device = esp_ow_new_dev(rom);
+  if (device == NULL) return NULL;
+
+  esp_ds18b20_st *st = os_zalloc(sizeof(esp_ds18b20_st));
+  if (st == NULL) {
+    os_free(device);
+    return NULL;
+  }
 
-  os_memcpy(device->rom, rom, 8);
   st->last_temp = ESP_DS18B20_TEMP_ERR;
   st->retries = -1;
   device->custom = st;
@@ -228,7 +233,6 @@ esp_ds18b20_new_dev(uint8_t *rom)
   return device;
 }
 
-
 esp_ow_device *ICACHE_FLASH_ATTR
 esp_ds18b20_get(uint8_t gpio_num)
 {

src/esp_ds18b20/include/esp_ds18b20.h

@@ -95,7 +95,7 @@ esp_ds18b20_search(uint8_t gpio_num, bool in_alert, esp_ow_device **list);
  *
  * @param rom The pointer to 8 byte ROM address
  *
- * @return The device.
+ * @return The device or NULL on error.
  */
 esp_ow_device *ICACHE_FLASH_ATTR
 esp_ds18b20_new_dev(uint8_t *rom);

src/esp_sht21/CMakeLists.txt

@@ -29,5 +29,4 @@ target_include_directories(esp_sht21 PUBLIC
 
 esp_gen_lib(esp_sht21
     ${ESP_CMAKE_FIND_DIR}
-    ${esp_i2c_LIBRARIES}
-    ${esp_tim_LIBRARIES})
+    ${esp_i2c_LIBRARIES})

src/esp_sht21/README.md

@@ -14,5 +14,5 @@ Before you can start communicating with SHT21 you have to call
 `esp_sht21_init`. You need to call it only once unless you change the GPIO
 pins setup somewhere else in your code.
 
-See driver documentation in [esp_sht21.h](include/esp_sht21.h) header file 
-for more details.
+See [example program](../../examples/sht21) and driver documentation in 
+[esp_sht21.h](include/esp_sht21.h) header file for more details.

src/esp_sht21/esp_sht21.c

@@ -15,7 +15,6 @@
  */
 
 #include <esp_sht21.h>
-#include <osapi.h>
 
 static uint8_t ICACHE_FLASH_ATTR
 calc_crc(uint8_t init, const uint8_t *data, uint8_t len)

src/esp_sht21/include/esp_sht21.h

@@ -18,8 +18,8 @@
 #ifndef ESP_SHT21_H
 #define ESP_SHT21_H
 
-#include <c_types.h>
 #include <esp_i2c.h>
+#include <c_types.h>
 
 #define ESP_SHT21_ADDRESS 0x40
 // Measure relative humidity. Hold Master Mode.
@@ -56,6 +56,7 @@
 // RH: 11bit TEMP: 11bit
 #define ESP_SHT21_RES0 0x3
 
+
 /**
  * Initialize SHT21.
  *