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可编程的通信模块
2019-2-22 16:12
- 通信技术
- 6
- 1819
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
请教SIM900 GSM测试信道不过
2018-5-25 17:07
- 通信技术
- 4
- 1789
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
手机定位这么快 是用的有源天线还是前置LNA+无源天线?
2018-5-22 15:20
- 通信技术
- 9
- 5799
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
3大物联网产品, 6大物联网平台
2020-4-24 15:12
- 物联网技术
- 176
- 52644
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
请问SIM800C在国外能直接用么?
2022-10-11 22:17
- 通信技术
- 14
- 5704
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
SIM800C HTTP访问速度不够稳定
2018-6-22 18:33
- 通信技术
- 7
- 5241
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
蓝牙信号差 ,用的移远通信的MC20CB模块
2018-5-15 10:41
- 通信技术
- 5
- 4495
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
如何给SIM868供电?18650电池咋样
2020-10-30 15:03
- 电源技术
- 7
- 3108
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
SIM800C的功耗大,电池才600mAh,有什么办法降低功耗么
2018-11-1 20:51
- 通信技术
- 19
- 7579
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
485+STM32+SIM800C数据采集终端问题
2018-5-12 11:19
- ST MCU
- 20
- 3352
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
请推荐过车规级的蓝牙模块
2018-5-8 14:42
- 物联网技术
- 4
- 1717
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
请问GPRS模块如何实现低功耗
2019-10-11 17:14
- 通信技术
- 14
- 5600
![](https://bbs.21ic.com/static/image/common/icon_quote_m_s.gif)
![](https://bbs.21ic.com/static/image/common/icon_quote_m_e.gif)
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