Forum Post: RE: CCS/MSP430I2040: MSP430i2040 Embedded Metering EVM convert IAR example code to CCS

HI James, According to here: e2e.ti.com/.../725083 There are 3 bytes included in packet, which is not part of spec. Is this both for TX and RX? How do you compute the checksum in this case? Sample(App Version): char cmdAppVersion[7] ={0x04, 0X02, 0X00, 0X05, 0X00, Checksum(LSB), Checksum(MSB)}; Checksum(LSB) = 0X0B? Checksum(MSB) =0X00? Regards, Walter