Personal Alarm dual GPS

Warning: The volume of the buzzer may cause hearing damage.

Built with

SIM A7670E 4G successor to the well-known 2G SIM800 modules with a built-in GNSS receiver.
The "E" after 7670 indicates the continent. For continents other than Europe, please consult the manual.
SAM M-10Q Ublox GNSS module
STM32G431CB STM32 board with compact dimensions

Activate alarm

Press the alarm button
12 x 1 Watt red LEDs flash at a frequency of 25 Hz (while sending SMS the LED's keep on burning, after sending it flashes)
Extremely powerful alarm signal (120dB)
The buzzer is disabled in the program using "//" (line 145). To avoid hearing damage, it is recommended to only activate it once everything has been tested and is ready for use.
SMS to a maximum of 5 mobile numbers with a pre-programmed text followed by the current location


Test

First press the test button, followed by the alarm button.
Then release the alarm button first, and then the test button.
A text message is sent to the number in position 6.
The LED's light for 1 second.
The buzzer activates for 1 second.

Usage

Fully programmable by sending an SMS to the module.
The module has 7 programmable positions.
All positions have a maximum length of 50 characters.
The module can only be programmed if PRGM_EN (PA1) is FALSE.
After programming disconnect PA1 from GND

Positions 1 through 5

Enter here the number of the contacts that should be notified with an SMS
Send an SMS in the format
#1 +32123456789#
SMS starts and ends with a #
After the first #, enter the number of the position to be programmed. If it is already programmed, the contents will be erased and overwritten.
Blank
Contact number in international format
SMS ends with a #
Response module via SMS to the number that sent the SMS
pos : 1 tel : +32123456789


Position 6

Enter your mobile phone number here.
During testing, a text message will be sent to this number.
#6 +32987654321#
Response module via SMS to the number that sent the SMS
pos : 6 tel : +32987654321


Position 7

Enter the pre-programmed text here that will be sent via SMS
For teenagers in dire need of money, the message might look like this:
#7 NO MONEY…BRING 100€ URGENTLY#
Response module via SMS to the number that sent the SMS
pos : 7 txt : NO MONEY…BRING 100€ URGENTLY

#LIST#

module responds with
pos : 1 tel: +32123456789
pos : 2 tel: +32123456789
pos : 3 tel: +32123456789
…
pos : 7 txt: NO MONEY…BRING 100€ URGENTLY


#5 DEL#

removes position 5
Answer module
pos 5 : deleted


see github
https://github.com/thieu-b55/Personal-Alarm-Dual-GPS