hi sir | Microcontroller › 8051 › how to convert C code into hex code using keil compiler › hi sir March 15, 2011 at 7:10 am #5749 kallappaParticipant sir we r doing project on automatic load shedding control using gsm.our idia is to control the relays throgh GSM , sms format is “relay number status time of ONorOFF”plz………… help me to write the c code