hello, i am high school student and i am newbie in microcontroller programming. I have some project that build man down alarm with ESP8266, GPS Neo 6M, Lora E220, and MPU6050.
The way this product works :
this product is divides into 2 types. One for the victim and another one for searcher. First we talk about product that intended doe victim. If the product is active and user doesnt do any movement and/or user make very large movements in a short period of time (ex:falling). it is will trigger man down state. the product will broadcast the coordinate of that product to all device nearby via lora in 433mhz. Another victim product that receive the lora signal will repeat the signal and trigger some alert like buzzer or led blink.
Then we talk about searcher product. this product broadcast its position to give another searcher information. If this product receive signal from victims device it will alert the user with buzzer or led and repeat this signal too (not change the signal value). this product make communication to the phone via esp access point (no internet connection). Esp will give victim and searchers longitude and latitude. Latitude and longitude will displayed on the phone in the form of an offline map
my questions :
is this project possible?
how to make communication between esp8266 and android via esp8266's wifi access point to send latitude and longitude
How to make display of longitude and latitude in the form of an offline map in phone?
What antennas are suitable for use if the place of use is in forests and mountains?
Can someone tell me about the code in general way?
okay thanks, noted. i choose 433mhz because after research some information in google, this radio wave have larger range if compared with 900mhz and 2.4ghz
This appears to be a fairly advanced project, what is your level of experience in hardware and software. An answer denominated in thousands of hours is expected.
And before you take the design of the product too far, once you have sorted out the frequency and power restrictions, its strongly recommended you go wandering with a couple of simple test nodes, a transmitter and a receiver.
What is important is the check that the range\distance you get, in the typical areas where its intended for use, is adequate.
