Quotemit Smith Did you ever figure this out. I've been having the same problem with no luck. Yes I forced a partial PayPal refund on sainsmart. The board doesn't have a bootloader installed which means it will never communicate with usb. It at this pint will only communicate via isp device. Sainsmart is a pain to deal with for refunds. Just force PayPal on them. And hopefully get a large partiaby WOOK111 - Next Wave Electronics Working Group
I was very foolish apparently and bought a melzi from SainSmart. and well dun dun dun. no bootloader. or isp or ext pins. however the holes are drilled and tinned on the board. but i do not have an avr programmer. so i cant install the bootloader. so this is where one of you guys may come in! hopefully one of you guys can assist in getting a bootloader on my melzi! first endevor into 3d printinby WOOK111 - Canada, Toronto RepRap User Group
i wish it were that. i saw that before in some other peoples symptoms and had tried it for over an hr to no avail. i really hope these reviews on amazon arent true! QuoteMost Helpful Customer Reviews 1 of 1 people found the following review helpful No support, doesn't work, defective connectors By Joseph Turner on February 16, 2014 Verified Purchase O bought this Melzi to upgrade the electronby WOOK111 - Mendel90
ok that makes sense to me. i DO know that in the block by the reset jumper where i see most boards have pins mine doesnt but it has tyhe holes and silkscreened on is ISP and EXT. is it hard to put a bootstrap on it? what is involved etc etc. just got this after having to pay a stupid amount of duty. if i have it sent back ill be out 40 bucks plus if they ship it back ill get dinged with MORE dutyby WOOK111 - Mendel90
yes i have and still nothing =/ this is my first time diving into the world of 3d printing. and so far its pretty discouragingby WOOK111 - Next Wave Electronics Working Group
was just asking for some help. i was under the assumption that a melzi is a melzi is a melzi regardless of whom soldered the chips on. there is a large language barrier between myself and sainsmart. i am just starting in this 3d printer endevour and i have chosen to use your plans and have thusfar followed the software portion to see if there is life in this board all i have done is have it cby WOOK111 - Mendel90
well i wont give up perhaps you and i nop can work on this together this is my first time EVER doing any of this arduino stuffby WOOK111 - Mendel90
That was the set of instructions i was following. also. the reprappro website has changed significantly apparently as the links posted in many of the reprap pages only lead to the homepage nowby WOOK111 - Next Wave Electronics Working Group
I have just recieved my sainsmart melzi board. i have yet to connect it to ANYTHING ie. stepper motors/hot end/heated bed i have however Switched the jumper to usb attached the cable i had also got usb drivers which recognize it as a com port now. however my led flashes at a consistent rate is this normal? also when following the steps mentioned in the mendel pdf it says to use arduino 1.0.by WOOK111 - Sanguino(lolu)
I have just recieved my sainsmart melzi board. i have yet to connect it to ANYTHING ie. stepper motors/hot end/heated bed i have however Switched the jumper to usb attached the cable i had also got usb drivers which recognize it as a com port now. however my led flashes at a consistent rate is this normal? also when following the steps mentioned in the mendel pdf it says to use arduby WOOK111 - Next Wave Electronics Working Group
yeah it shows as com3 and everything seems to be ok port wise. its just no matter how many times i click upload i get the same error. the light DOES momentarily stop and then it keeps flashing. almost like it got a request or something.by WOOK111 - Mendel90
I have just recieved my sainsmart melzi board. i have yet to connect it to ANYTHING ie. stepper motors/hot end/heated bed i have however Switched the jumper to usb attached the cable i had also got usb drivers which recognize it as a com port now. however my led flashes at a consistent rate is this normal? also when following the steps mentioned in the mendel pdf it says to use arduby WOOK111 - Mendel90