prepare a module for 4 x 4 key pad 8 pin membrane, when we push the numbers should be save a memory card with timestamp or send via sms/ wifi.
12 freelancer bu iş için ortalamada 431$ teklif veriyor
we have experience with gsm, WiFi, and keypad readers with data logging systems. we have developed system with Bluetooth. if you have time we can demonstrate it.. thanks lasantha prasad