一.前面的話

說實話,騰訊云物聯網平臺一直是我比較喜歡的物聯網云太平,除了有騰訊大廠作為品質背書之外,提供的sdk也是相當好用,更有騰訊連連小程序可以幫助做界面,調試功能,后端的API有java,c++,Golang,js,python等等語言版本,非常方便,簡直是上云首選.

二.首先下載sdk

我們首先來找官方sdk,茫茫文檔中給我看到了那熟悉的身影:

文檔地址在這,拿走不謝:

https://cloud.tencent.com/document/product/1081/48356

把sdk下載之后,熟練的放進thirdparty文件夾,

不得不提一下,2.x版本的OpenHarmony比1.x版本的代碼結構清晰多了.

1.實現幾個重要接口

這個時候依然要看文檔,因為有些函數需要自己實現,具體是哪些呢,在這里:

https://cloud.tencent.com/document/product/1081/48389

這篇文檔寫了,我們要實現里面的這些接口,此處列舉一二:

仔細一看,霍,好家伙還不少呢,但是不怕,都是打工人,誰怕誰啊,二話不說我就寫,結果就給我給寫出來了:

寫出來這些后就可以準備編譯了嗎?

nonono,我們還沒做BUILD.gn文件呢,話不多說,直接教你寫。

1. # Copyright (c) 2020 Huawei Device Co., Ltd.
2. # Licensed under the Apache License, Version 2.0 (the "License");
3. # you may not use this file except in compliance with the License.
4. # You may obtain a copy of the License at
5. #
6. # http://www.apache.org/licenses/LICENSE-2.0
7. #
8. # Unless required by applicable law or agreed to in writing, software
9. # distributed under the License is distributed on an "AS IS" BASIS,
10. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11. # See the License for the specific language governing permissions and
12. # limitations under the License.
13.  
14. import("//build/lite/config/component/lite_component.gni")
15. import("//build/lite/ndk/ndk.gni")
16.  
17. config("qcloud_sdk_config") {
18.  
19. include_dirs = [
20. "sdk_src/internal_inc",
21. "sdk_src/library",
22. "include",
23. "include/exports",
24.  
25. "//kernel/liteos_m/kernel/include",
26.  
27. # "//third_party/cmsis",
28. "//third_party/mbedtls/include",
29. "//third_party/mbedtls/include/mbedtls",
30.  
31. ]
32.  
33.  
34. }
35. cflags = [ "-Wno-unused-variable" ]
36. cflags += [ "-Wno-unused-but-set-variable" ]
37. cflags += [ "-Wno-unused-parameter" ]
38. cflags += [ "-Wno-sign-compare" ]
39. cflags += [ "-Wno-unused-function" ]
40. cflags += [ "-Wno-return-type" ]
41.  
42. qcloud_sdk_sources = [
43. "sdk_src/network/socket/network_socket.c",
44. "sdk_src/network/tls/network_tls.c",
45. "sdk_src/network/network_interface.c",
46.  
47. "sdk_src/utils/utils_list.c",
48. "sdk_src/utils/utils_base64.c",
49. "sdk_src/utils/qcloud_iot_ca.c",
50. "sdk_src/utils/utils_aes.c",
51. "sdk_src/utils/utils_getopt.c",
52. "sdk_src/utils/utils_hmac.c",
53. "sdk_src/utils/utils_md5.c",
54. "sdk_src/utils/utils_sha1.c",
55. "sdk_src/utils/json_parser.c",
56. "sdk_src/utils/json_token.c",
57. "sdk_src/utils/string_utils.c",
58. "sdk_src/utils/utils_ringbuff.c",
59. "sdk_src/utils/qcloud_iot_log.c",
60. "sdk_src/utils/qcloud_iot_device.c",
61. "sdk_src/utils/utils_timer.c",
62.  
63. "sdk_src/protocol/mqtt/mqtt_client_common.c",
64. "sdk_src/protocol/mqtt/mqtt_client_connect.c",
65. "sdk_src/protocol/mqtt/mqtt_client_net.c",
66. "sdk_src/protocol/mqtt/mqtt_client_publish.c",
67. "sdk_src/protocol/mqtt/mqtt_client_subscribe.c",
68. "sdk_src/protocol/mqtt/mqtt_client_unsubscribe.c",
69. "sdk_src/protocol/mqtt/mqtt_client_yield.c",
70. "sdk_src/protocol/mqtt/mqtt_client.c",
71.  
72. "sdk_src/services/data_template/data_template_action.c",
73. "sdk_src/services/data_template/data_template_client.c",
74. "sdk_src/services/data_template/data_template_client_common.c",
75. "sdk_src/services/data_template/data_template_client_json.c",
76. "sdk_src/services/data_template/data_template_client_manager.c",
77. "sdk_src/services/data_template/data_template_event.c",
78.  
79. "platform/os/liteos_m/HAL_Device_liteos_m.c",
80. "platform/os/liteos_m/HAL_OS_liteos_m.c",
81. "platform/os/liteos_m/HAL_TCP_liteos_m.c",
82. "platform/os/liteos_m/HAL_Timer_liteos_m.c",
83. # "./os/liteos_m/HAL_TLS_mbedtls_liteos_m.c",
84. # "./tls/mbedtls/HAL_DTLS_mbedtls.c",
85. "platform/tls/mbedtls/HAL_TLS_mbedtls.c",
86.  
87.  
88. ]
89.  
90. lite_library("qcloud_sdk_static") {
91. target_type = "static_library"
92.  
93. sources = qcloud_sdk_sources
94. public_configs = [ ":qcloud_sdk_config" ]
95. }
96.  
97. lite_library("qcloud_sdk_shared") {
98. target_type = "shared_library"
99. sources = qcloud_sdk_sources
100. public_configs = [ ":qcloud_sdk_config" ]
101. }
102.  
103. ndk_lib("qcloud_ndk") {
104. if (board_name != "hi3861v100") {
105. lib_extension = ".so"
106. deps = [
107. ":qcloud_sdk_shared"
108. ]
109. } else {
110. deps = [
111. ":qcloud_sdk_static"
112. ]
113. }
114. head_files = [
115. "//third_party/iot_link/network/mqtt/paho_mqtt/paho"
116. ]
117. }

整完之后就可以嘗試一下有沒有錯誤了.

2.在main里面寫邏輯,處理事情

我們把官方sdk里面的點燈demo拿過來,直接新建一個demo文件夾,把文件放進去:

自己寫好BUILD.gn,跟之前華為云對接一個套路,大家這么聰明,不用我多說了:

1. # Copyright (c) 2020 Nanjing Xiaoxiongpai Intelligent Technology Co., Ltd.
2. # Licensed under the Apache License, Version 2.0 (the "License");
3. # you may not use this file except in compliance with the License.
4. # You may obtain a copy of the License at
5. #
6. # http://www.apache.org/licenses/LICENSE-2.0
7. #
8. # Unless required by applicable law or agreed to in writing, software
9. # distributed under the License is distributed on an "AS IS" BASIS,
10. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11. # See the License for the specific language governing permissions and
12. # limitations under the License.
13.  
14. static_library("qcloud_demo") {
15. sources = [
16. # "iot_thread.c",
17. "light.c",
18. "light_data_template_sample.c"
19.  
20. ]
21.  
22. cflags = [ "-Wno-unused-variable" ]
23. cflags += [ "-Wno-unused-but-set-variable" ]
24.  
25. include_dirs = [
26. ".",
27. "//foundation/communication/softbus_lite/os_adapter/include",
28. "//utils/native/lite/include",
29. "//kernel/liteos_m/components/cmsis/2.0",
30. "//base/iot_hardware/peripheral/interfaces/kits",
31. "//third_party"
32.  
33. ]
34.  
35. deps = [
36. "//third_party/qcloud-iot-explorer-sdk-embedded-c-3.2.0:qcloud_sdk_static",
37. # "//third_party/qcloud-iot-explorer-sdk-embedded-c-3.2.0/external_libs/mbedtls:mbedtls_static",
38. ]
39.  
40.  
41. }

然后在sample里面的sdk把這個文件夾開啟編譯:

這樣就完成了代碼的編寫了,很快樂有木有。

三.在云平臺上創建設備

其實創建設備的過程官方文檔也的確挺詳細的,幾乎不用再另外加工,這里給出官方的智能燈接入指南:

https://cloud.tencent.com/document/product/1081/41155

官方定義了許多的物模型,其實我們的產品可能是官方物模型沒有定義的,此時我們就需要自己定義產品的屬性,事件和動作等,這塊自己仔細閱讀官方文檔就能搞懂

https://cloud.tencent.com/document/product/1081/34916

搞定了物模型,創建一個設備,記錄下設備的產品id,設備id和連接秘鑰

這點跟華為云平臺不太一樣,騰訊云的產品秘鑰是平臺生成的,而華為云平臺是你自己定義好設備的秘鑰,在創建設備的時候傳上去

四.編譯,運行

編譯的過程倒是很順利,這里就不過多廢話了.

不過在運行的時候出現一個情況,就是mutex不夠用了

自己折騰了一晚上也沒找不解決辦法,后面經過請教猴哥才搞明白:

阿不對,下面這個候哥才對,大家可以去他主頁關注一下:

https://harmonyos.51cto.com/user/posts/13519852

候哥真大神也,短短一兩句話就幫我搞定了,在此特別感謝侯哥的幫助:

然后我就把我的mutex相關代碼改成posix接口,這是修改之前的:

1. void *HAL_MutexCreate(void)
2. {
3. osMutexAttr_t attr;
4. osMutexId_t mutex;
5. char mutexName[RT_NAME_MAX];
6. static uint32_t mutex_v;
7.  
8. attr.name = mutexName;
9. attr.cb_mem = &mutex_v;
10. attr.cb_size = 4;
11.  
12. mutex = osMutexNew(&attr);
13. if (NULL == mutex) {
14. HAL_Printf("create mutex failed");
15. }
16.  
17. return mutex;
18. }
19.  
20. void HAL_MutexDestroy(_IN_ void *mutex)
21. {
22. int err_num;
23.  
24. err_num = osMutexDelete((osMutexId_t)mutex);
25.  
26. if (0 != err_num) {
27. HAL_Printf("destroy mutex failed");
28. }
29. }
30.  
31. void HAL_MutexLock(_IN_ void *mutex)
32. {
33. int err_num;
34.  
35. err_num = osMutexAcquire((osMutexId_t)mutex, osWaitForever);
36.  
37. if (0 != err_num) {
38. HAL_Printf("lock mutex failed");
39. }
40. }
41.  
42. void HAL_MutexUnlock(_IN_ void *mutex)
43. {
44. int err_num;
45.  
46. err_num = osMutexRelease((osMutexId_t)mutex);
47.  
48. if (0 != err_num) {
49. HAL_Printf("unlock mutex failed");
50. }
51. }
52.  
53. int HAL_MutexTryLock(_IN_ void *mutex)
54. {
55. int err_num;
56.  
57. err_num = osMutexAcquire((osMutexId_t)mutex, osNoWait);
58.  
59. if (0 != err_num) {
60. HAL_Printf("trylock mutex failed");
61. }
62. return err_num;
63. }

改完之后是這樣:

1. void *HAL_MutexCreate(void)
2. {
3. // osMutexAttr_t attr;
4. // osMutexId_t mutex;
5. char mutexName[RT_NAME_MAX];
6. static uint32_t mutex_v;
7.  
8. pthread_mutex_t * mutex = HAL_Malloc(sizeof(pthread_mutex_t));
9. pthread_mutexattr_t attr;
10.  
11. int ret = pthread_mutex_init(mutex, &attr); // osMutexNew(&attr);
12. // if (NULL == mutex) {
13. if (ret != 0) {
14. HAL_Printf("create mutex failed ");
15. }
16.  
17. return mutex;
18. }
19.  
20. void HAL_MutexDestroy(_IN_ void *mutex)
21. {
22. int err_num;
23.  
24. err_num = pthread_mutex_destroy(mutex);
25.  
26. if (0 != err_num) {
27. HAL_Printf("destroy mutex failed");
28. }
29. }
30.  
31. void HAL_MutexLock(_IN_ void *mutex)
32. {
33. int err_num;
34.  
35. err_num = pthread_mutex_lock(mutex);
36.  
37. if (0 != err_num) {
38. HAL_Printf("lock mutex failed");
39. }
40. }
41.  
42. void HAL_MutexUnlock(_IN_ void *mutex)
43. {
44. int err_num;
45.  
46. err_num = pthread_mutex_unlock(mutex);
47.  
48. if (0 != err_num) {
49. HAL_Printf("unlock mutex failed");
50. }
51. }
52.  
53. int HAL_MutexTryLock(_IN_ void *mutex)
54. {
55. int err_num;
56. struct timespec absTimeout={0,0};
57.  
58. err_num = pthread_mutex_timedlock(mutex, &absTimeout);
59.  
60. if (0 != err_num) {
61. HAL_Printf("trylock mutex failed");
62. }
63. return err_num;
64. }

使用的時候記得加上頭文件: #include

處理完這個異常情況,接下來就很順利的登錄騰訊云平臺收發數據了

五.云平臺控制展示

直接查看動圖,控制還是很及時的:

六.總結

其實對接騰訊云還是蠻簡單的,最新版的sdk在打印上也比以前好多了.OpenHarmony的2.x版本優化了不少東西,記得去年這時候用1.x版本對接的時候還是很費勁的,給OpenHarmony團隊點贊,也給騰訊云團隊點贊

大家趕緊玩起來吧

原文鏈接：https://harmonyos.51cto.com