ESP32 (IDF). The GPS+GSM+gyroscope alarm tracker with BLE token authtorization & configuration via web page.

Web pages (activated on ACC ON. Deactiovated on "no activity on web page")

Hardware design

with Li-ion 1S.

AMS1117 LDO has to big voltage drop(1.4v). Mast be changed on an other LDO (dV<0.3V) for using with Li-ion 1S.

with LiFePo4 2S (final)

More preferable for unattender devices (non flammable).

current consumption.

• ESP32 + gyroscope - 3.3V 40mA (120mA - BLE scaning)
• GPS neo-6m (+antenne) - 3.3V 50mA (without UNX CFG-RXM Power Save Mode)
• GSM SIM800L - 4.0V 50..100mA (without SIM800L_DTR_GPIO+"AT+CSCLK=1")

SMS comamnds

• "I[nfo]" - get the gps state
• "S[tate]" - get the last state
• "T[rack]" - get list of last gps states.
• "C[onf]" - get the current configuration.
• "G[yro]," - set the gyroscope alarm threshold
• "V[oltage]," - set the local accumulator voltage alarm threshold
• "A[larm]<0/1>" - disable/enable send alarm sms.
• "B[le]" - get (by sms) list of BLE devices nearby.
• "E[nableBle] <hex1,hex2,..>" - list of authorazed BLE devices
• "H[ang up]0,1" - 0-microphone on. 1-send sms on call.
• Reboot

SMS async. alarm messages

• gyroscope alarm (impact|moving|..) (no authorized BLE nearby)
• ACC ON/OFF (no authorized BLE nearby)
• local accumulator voltage (below treshold)
• forwarding incomming sms fom unknown source