PCB design stm + sim900
Budget: €750 – €1,500 EUR
i need PCB design stm + sim900 ,battery powered ( 2x 3.6 Battery in parallel).
all data send to cloud database, we have 3 inputs ( reed relay, temperature sensor and pressure transducer ) all 3 sensors are in water
algorithm is as follow
1. PCB sleep all time
2. When reed relay close , after 30 second we need to read temperature and pressure
3. Send data ( format is < PCB ID, time/date,reed relay status, temperature, pressure>
4. After send data PCB go to sleep
5. Reed relay after some time ( time is x ) change status to open ,
6. We don’t use new reading just send <PCB ID, time/date,reed relay status
7. PCB go to sleep again until new signal from reed relay happen
Note: for stable operation need to add some delay time regarding operation of reed relay ( if signal is stable for 5 second then is ok to act )
so I need PCB design, code , and working prototype
all data send to cloud database, we have 3 inputs ( reed relay, temperature sensor and pressure transducer ) all 3 sensors are in water
algorithm is as follow
1. PCB sleep all time
2. When reed relay close , after 30 second we need to read temperature and pressure
3. Send data ( format is < PCB ID, time/date,reed relay status, temperature, pressure>
4. After send data PCB go to sleep
5. Reed relay after some time ( time is x ) change status to open ,
6. We don’t use new reading just send <PCB ID, time/date,reed relay status
7. PCB go to sleep again until new signal from reed relay happen
Note: for stable operation need to add some delay time regarding operation of reed relay ( if signal is stable for 5 second then is ok to act )
so I need PCB design, code , and working prototype