pcsoft.us.windevCopyright 2026, PC SOFT1 Jan 2019 09:14:32 Z14 Feb 2015 00:58:56 ZI'm trying to communicate with a Ingenico Eftpos machine. I'm having trouble getting the checksum of a string of hex charaters Below works // String to write into the port StringToWrite is string = HexaToBuffer("0249034A") 02 Start of text 49 The letter I to initialize eftpost machine (Login) 03 End Of Text 4A the checksum of 02 49 03 But I need to work the checksum out in my code not just hard code it as I need to send different types of request all with diff checksums. Has anyone done this? and could pass the code to me or point me in the right direction. PS I'm new to WinDev Thanks in advance... Mark30WEBDEVen_UShttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum/read.awpmoderateur@pcsoft.fr (El moderador)webmaster@pcsoft.fr (El webmaster)zunaidpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-66934/read.awp1 Jan 2019 09:14:32 ZHi Mark, did you resolve this issue? If so please let me know how you accomplished it. I've managed to calculate the LRC but …https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-66934/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-66934/read.awpCheckSumMichel GARCIApcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50498/read.awp15 Feb 2015 23:53:40 ZHi... Google is your friend, wikipedia is your friend ... a little bit of work translation, and it is fixed ... Have fun ! …https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50498/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50498/read.awpCheckSumpurchasepcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50495/read.awp15 Feb 2015 21:01:34 ZLRC checksum = Longitudinal redundancy check. Thankshttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50495/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50495/read.awpCheckSumfromwebpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50483/read.awp14 Feb 2015 20:24:11 ZHello Mark First, are you suppose to send the checksum of the hexa representation or of the binary values? Second, what …https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50483/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/50477-checksum-50483/read.awpCheckSum