RN4871无响应我可以在不使用命令的情况下恢复出厂设置吗？

我不相信你能用PIN配置来重置设备，虽然如果你可以的话，它会为我节省很多的痛苦。我已经通过一个标准的FTDI板重新加载固件来恢复无响应的单元。在THNN7070／71 PICTROW附件中的附录/ PICTWORD子板用户指南分类描述了如何做到这一点。这有点棘手，如果你需要帮助，请告诉我。



      以下为原文

    I don't believe you can factory reset the device using pin configuration only, though it would have saved me a lot of grief if you could.
 
I've been able to revive unresponsive units by re-loading the firmware through a standard FTDI board.  The appendix in the RN4870/71 PICtail™/PICtail PLUS DAUGHTER BOARD USER’S GUIDE sort of describes how to do this.  It's a bit tricky, let me know if you need some help.

Hislach，谢谢你的回复，我没有PIC尾子板，我正在与独立的RN48 71模块连接到我的项目。事情是，在过去的时候，我已经发送了SR，8000命令来设置H/W流量控制。现在，如果我检查CTS（RN878）PIN，它总是高后，我刚刚。模块（或者按顺序拉SCI（Pin 16）和RST（Pin 10）），换句话说，它还没有准备好接收任何命令。



      以下为原文

    Hi slach,
 
Thanks for reply, I do not have PIC TAIL DAUGHTER BOARD I am working with stand alone RN4871 module connected to my project.
 
The thing is, in past when it was working I had sent SR,8000 command to set H/W flow control on.
now if I check CTS (of RN4871) pin it is always high after I have just power up the module (or pulled SCI(pin16) and RST(pin10) high - in that order), in other words it is not yet ready to receive any command.

如果你的单位没有回应你所能做的就是尝试重新加载固件。如果你有一个独立的单元，你需要一个3.3V的FTDI板和访问引脚2（GND），7（RX），8（TX），13（GND），14（3.3V）和16（2200）来重新加载固件。加上来自微芯片的Windows ISUPDATE.EXE程序和固件文件



      以下为原文

    If your unit doesn't respond about all you can do is try to reload the firmware.  If you have a stand alone unit you'd need a 3.3v FTDI board and access to pins 2 (gnd), 7 (rx), 8 (tx), 13 (gnd), 14 (3.3v) & 16 (P2_0) to reload the firmware.  Plus the Windows isupdate.exe program and firmware files from MicroChip  

解决方法：RN48的RTS引脚上需要下拉电阻（1KOHM）----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------打开MCU中的H/W流量控制，这个引脚不是完全在0V（或0.00 nV作为另一个流量控制线），它是0.180 +V，我怀疑它不够低。因为我的模块已经放在电路（我的项目）中，而不是断开所有的引脚，我只是操纵双方的CTS，所以Y随时准备接收。这暂时解决了我的问题，现在我可以通信到RN861（当然H/W流量控制不要紧，因为CTS的低）“$$“工作精细”SR  R”和“SSR”“工作完成并通过透明UART通信现在我尝试工厂复位，我尝试工厂复位”。使用“2”作为ARG，它没有工作……“SF，2  R”“Err”，但“SF，1  R”运行好，设备工厂重新设置（回复重新启动……）再次检查没有任何流量控制一切都很好，但打开H/W流量控制每件事停止工作……正如我提到的，我把一个1K下拉在RTS（FRO）M RN48 71），现在它的工作与H/W流量控制。



      以下为原文

    Solved: All it needed was pull down resistor (1kOhm) on RTS pin of RN4871
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I mentioned CTS on RN4871 side was always high, that was mistake RTS on Bluetooth side remain high,
even if I turned on H/W flow control in MCU this pin was not completely at 0v(or 0.00nV as the other flow control line) it was 0.180+V, which I doubt was not low enough.
 
As my module is already placed in circuit(of my project) instead of disconnecting all the pins I just manipulated CTS of both sides, so they are always ready to  receive.
 
This solved my problem temporarily,
now I can communicate to RN4871 (of course H/W flow control is does not matter as CTS's are low)
"$$$" worked fine
"SRr" and "SSr" worked fine
and communicated over transparent  UART
 
Now I tried to Factory reset, I tried to  factory reset using "2" as arg it did not work...
"SF,2r"
"ERR"
 
But "SF,1r" worked ok, device factory reseted (replied rebooting...)
 
again checking without any flow control everything worked fine but turning on h/w flow control every thing stopped working....
 
as I mentioned after I put a pull-down of 1K at RTS(from RN4871) and now its working with H/W flow control.
 
 
 
 

我怀疑当你没有仪表连接时，电压会更高。



      以下为原文

   
I suspect the voltage was much higher when you did not have a meter connected to it.