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Top Forums Programming Basic Arduino UNO Bluetooth Testing with the BLE 4.0 (CC2541, MLT-BT04 IC) Post 303043348 by Neo on Saturday 25th of January 2020 09:25:19 AM
Old 01-25-2020
Here is the chip.... as I find these kind of details matter and are often omitted on these kinds of Internet tutorials and discussions. I will replace this photo (taken quickly with my iPhone) with a screen shot from my computer when I find the USB cable to my little microscope.

In fact, the way I got this test to work (finding a starting point sketch) was to use my microscope to read the model number on the chip: the CC2541

A number of times recently, I received some modules with the model number of the chip "burned off" with a laser, which is really annoying.

Basic Arduino UNO Bluetooth Testing with the BLE 4.0 (CC2541, MLT-BT04 IC)-img_9039jpg


Update: Here is the same chip shot using the USB interface to my Mac Pro :

Basic Arduino UNO Bluetooth Testing with the BLE 4.0 (CC2541, MLT-BT04 IC)-s20200126_001jpg


Both "chip shots" were taken though the plastic wrapper around the BLE module... that is why the image is a bit blurry)
 

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BTHOST(1)						    BSD General Commands Manual 						 BTHOST(1)

NAME
bthost -- look up Bluetooth host names and Protocol Service Multiplexor values SYNOPSIS
bthost [-bhp] host_or_protocol DESCRIPTION
The bthost utility looks for information about Bluetooth hosts and Protocol Service Multiplexor (PSM) values. It gets this information from the /etc/bluetooth/hosts and /etc/bluetooth/protocols files. In host mode, it simply converts between the host names and Bluetooth addresses. The argument can be either a host name or a Bluetooth address. The program first attempts to interpret it as a Bluetooth address. If this fails, it will treat it as a host name. A Bluetooth address consists of six hex bytes separated by a colon, e.g., ``01:02:03:04:05:06''. A host name consists of names separated by dots, e.g., ``my.cell.phone''. In protocol mode, it simply converts between the Protocol Service Multiplexor names and assigned numbers. The argument can be either a Pro- tocol Service Multiplexor name or an assigned number. The program first attempts to interpret it as an assigned number. The options are as follows: -b Produce brief output. -h Display usage message and exit. -p Activate protocol mode. The bthost utility will print results to the standard output, and error messages to the standard error. An output can be quite different, here is an example that demonstrates all of the possibilities: % bthost localhost Host localhost has address FF:FF:FF:00:00:00 % bthost ff:ff:ff:00:00:00 Host FF:FF:FF:00:00:00 has name localhost % bthost -b localhost FF:FF:FF:00:00:00 % bthost -b ff:ff:ff:00:00:00 localhost % bthost do.not.exists do.not.exists: Unknown host % bthost 0:0:0:0:0:0 00:00:00:00:00:00: Unknown host % bthost -p sdp Protocol/Service Multiplexor sdp has number 1 % bthost -p 3 Protocol/Service Multiplexor rfcomm has number 3 % bthost -bp HID-Control 17 % bthost -p foo foo: Unknown Protocol/Service Multiplexor FILES
/etc/bluetooth/hosts /etc/bluetooth/protocols EXIT STATUS
The bthost utility exits 0 on success, and >0 if an error occurs. SEE ALSO
bluetooth(3), bluetooth.hosts(5), bluetooth.protocols(5) AUTHORS
Maksim Yevmenkin <m_evmenkin@yahoo.com> BSD
May 8, 2003 BSD
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