SX1276/77/78/79 LoRa超长距低功耗无线收发器数据手册

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本文档是关于Semtech公司出品的SX1276/77/78/79系列低功耗长距离无线收发器的数据手册，该系列产品专为137MHz至1020MHz频段设计，采用LoRa™调制技术。LoRa是一种专为超远距离、低功耗和高抗干扰通信而优化的无线通信解决方案。 SX1276/77/78/79的特点包括： 1. **专利的LoRa调制技术**：这一创新技术使得这些设备在使用低成本晶体和物料的情况下，能够实现超过-148dBm的接收灵敏度，这在行业中具有显著优势，极大地扩展了通信范围并降低了能耗。 2. **强大的性能和链接预算**：结合内置的+20dBm功率放大器，这些设备提供出色的链接预算，非常适合对范围或鲁棒性有高要求的应用，如物联网(IoT)设备、远程监控系统等。 3. **干扰和能源效率的平衡**：与传统调制技术相比，LoRa在保持远距离通信的同时，提供了更好的阻塞和选择性，解决了通常存在的范围、抗干扰能力和能源消耗之间的设计矛盾。 4. **支持多种模式**：除了LoRa模式，SX1276/77/78/79还支持高性能GFSK（正交幅度调制）模式，适用于包括WMBus和IEEE 802.15.4g在内的各种系统，确保了设备在不同应用环境中的灵活性。 5. **卓越的相位噪声**：这些设备的相位噪声控制优秀，有助于提高信号质量，减少误码率，从而提升通信的可靠性和稳定性。 6. **广泛的应用场景**：由于其高性能和多功能性，SX1276/77/78/79非常适合用于各种无线传感器网络、工业自动化、智能电网、智慧城市等各种需要远距离和低功耗通信的场景。 这份数据手册为开发人员提供了详尽的规格、功能介绍和技术细节，帮助用户充分利用这些设备的优势，设计出满足不同应用场景需求的高效无线通信系统。无论是对LoRa技术的初学者还是专业工程师，这都是一个宝贵的参考资料。

LoRa sx1276\77\78\79 调制模块 数据手册

2016-06-28 上传
LoRa的sx系列的调制模块，功能强大，适合物联网远程低功耗连接

SX1276/77/78中文手册

2020-09-22 上传
SX1276/77/78中文手册 远程低功耗，通讯收发器主要采用FSK 和 LoRaTM 调制解调器，用于超长距离扩频通信，抗干扰，稳定。

select p3.vehicle_code, p3.harness_name, p3.harness_number, p2.harness_connect_code, p2.connector_brand_name, p2.element_brand_name, p4.item_code, p4.k1_e_status, DISTINCT p2.element_brand_name,p2.connector_code from pz_k1_e12_item p1 left join pz_k1_e07_item p2 on p1.e07_id = p2.id left join pz_k1_e07 p3 on p2.harness_id = p3.id left join pz_k1_e02 p4 on p4.id = p1.e02_id where p3.vehicle_code='SX11AD-2021' GROUP BY p2.element_brand_name,p2.connector_code > 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DISTINCT p2.element_brand_name,p2.connector_code from pz_k1_e12_item p1 left j' at line 10 > 时间: 0.005s

2023-06-13 上传
WHERE p3.vehicle_code='SX11AD-2021' GROUP BY p2.element_brand_name, p2.connector_code; ``` 这样就可以查询到不重复的 element_brand_name 和 connector_code 列，并且不会有语法错误了。

p2.connector_brand_name, p2.element_brand_name, p4.item_code, p4.k1_e_status from pz_k1_e12_item p1 left join pz_k1_e07_item p2 on p1.e07_id = p2.id left join pz_k1_e07 p3 on p2.harness_id = p3.id left join pz_k1_e02 p4 on p4.id = p1.e02_id where p3.vehicle_code='SX11AD-2021' GROUP BY p2.element_brand_name,p2.connector_code > 1055 - Expression #4 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'edds.p3.harness_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by > 时间: 0.005s

2023-06-13 上传
WHERE p3.vehicle_code='SX11AD-2021' GROUP BY p2.connector_brand_name, p2.element_brand_name, p4.item_code, p4.k1_e_status; ``` 这样就可以查询到 p2.connector_brand_name、p2.element_brand_name、p4....

motionsensor_chip.ko ot_lt8618sx.ko ot_sample_ist.ko ot_spi.ko motionsensor_mng.ko ot_piris.ko ot_sensor_i2c.ko ot_es8388.ko ot_pwm.ko ot_sensor_spi.ko这些都是什么

2023-06-13 上传
- ot_lt8618sx.ko：LT8618SX HDMI 转换器的驱动程序，用于实现 HDMI 视频输出功能。 - ot_piris.ko：PIR（Passive Infrared）传感器的驱动程序，用于检测人体的热量并输出信号。 - ot_pwm.ko：PWM（Pulse Width ...

sprintf(cStr,cam_mode.lcd_sx,cam_mode.lcd_sy,cam_mode.cam_width,cam_mode.cam_height);把这个参数怎么改成const char * restrict

2023-05-18 上传
sprintf(cStr, format, cam_mode.lcd_sx, cam_mode.lcd_sy, cam_mode.cam_width, cam_mode.cam_height); ``` 其中，我们首先定义了一个 const char * 类型的指针变量 format，用于存储格式化字符串，它的值为 "%d x...

SELECT 0,sum(number) from ( SELECT inc.disposal_result as results, COUNT() as number FROM soc_data.incidents inc JOIN soc_data.incidents_monitor mon ON inc.incidents_id = mon.incidents_id WHERE inc.disposal_result IS NOT NULL and inc.disposal_result ='3' GROUP BY results) a UNION ALL SELECT 1,sum(number) from ( SELECT inc.disposal_result as results, COUNT() as number FROM soc_data.incidents inc JOIN soc_data.incidents_monitor mon ON inc.incidents_id = mon.incidents_id WHERE inc.disposal_result IS NOT NULL and inc.disposal_result !='3' GROUP BY results) b 优化sql保证输出的结果为 第一行 0,结果，第二行 1,结果

2023-06-02 上传
可以尝试使用如下的 SQL 语句进行优化： ``` SELECT 0, SUM(CASE WHEN inc.disposal_result = '3' THEN 1 ELSE 0 END) AS result_0 FROM soc_data.incidents inc JOIN soc_data.incidents_monitor mon ON inc....

帮我优化如下sql：SELECT T1.quyu, T2.lastNum, T3.jdNum, T4.xcNum FROM (SELECT STREET AS quyu FROM STREET_YXW WHERE 1=1 GROUP BY STREET ) T1 LEFT JOIN ( SELECT T2.STREET_NAME AS quyu,COUNT(*) AS lastNum FROM V_FIRESAFETYREGISTER_DYC T1 LEFT JOIN V_HSE_COMB_BUILDING_INFO_PA T2 ON LEFT(T1.HOUSEID,19) = T2.BUILDING_CODE WHERE T1.LASTLOGOUTTIME IS NOT NULL and date_format(T1.LASTLOGOUTTIME,'%Y') = ? GROUP BY T2.STREET_NAME ) T2 ON T1.quyu = T2.quyu LEFT JOIN ( SELECT T3.STREET_NAME AS quyu,COUNT(DISTINCT T1.FIREID) AS jdNum FROM V_SX_FIRESAFETYPLAN T1 LEFT JOIN V_FIRESAFETYREGISTER_DYC T2 ON T1.FIREID = T2.ID LEFT JOIN V_HSE_COMB_BUILDING_INFO_PA T3 ON LEFT(T2.HOUSEID,19) = T3.BUILDING_CODE WHERE T1.DATE_NEW IS NOT NULL and date_format(T1.DATE_NEW,'%Y') = ? GROUP BY T3.STREET_NAME ) T3 ON T1.quyu = T3.quyu LEFT JOIN ( SELECT T3.STREET_NAME AS quyu,COUNT(*) as xcNum FROM V_SX_FIRESAFETYTRAINING T1 LEFT JOIN V_FIRESAFETYREGISTER_DYC T2 ON T1.FIREID = T2.ID LEFT JOIN V_HSE_COMB_BUILDING_INFO_PA T3 ON LEFT(T2.HOUSEID,19) = T3.BUILDING_CODE WHERE T1.TRAININGTIME IS NOT NULL and date_format(T1.TRAININGTIME,'%Y') = ? GROUP BY T3.STREET_NAME ) T4 ON T1.quyu = T4.quyu ORDER BY T2.lastNum limit ?,?

2023-06-09 上传
FROM V_SX_FIRESAFETYPLAN T1 LEFT JOIN V_FIRESAFETYREGISTER_DYC T2 ON T1.FIREID = T2.ID LEFT JOIN V_HSE_COMB_BUILDING_INFO_PA T3 ON LEFT(T2.HOUSEID, 19) = T3.BUILDING_CODE WHERE T1.DATE_NEW IS NOT NULL...

sx1278驱动代码

2023-05-27 上传
以下是一个基于STM32的sx1278驱动代码示例： ```c #include "stm32f10x.h" #include "sx1278.h" #define SX1278_SPI SPI1 #define SX1278_SPI_PIN GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7 #define SX1278_SPI_GPIO ...

STM32 驱动SX1278的源码

2023-05-26 上传
以下是一个基于STM32的SX1278无线模块驱动代码示例，你可以根据自己的需要进行修改和调整： ```c #include "stm32f10x.h" #include "sx1278.h" #define SX1278_SPI SPI1 #define SX1278_SPI_GPIO GPIOA #define SX...
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