Hello,
I have an Arduino in a field and am going to be making a couple more.
I would like a way to update the code on them remotely.
How can I do that? 
Matt
There may be many ways, but it firstly depends on what you mean by "remotely"?
Secondly, if the code works when it is deployed, why would you imagine a need to "upgrade" it? You are not working for Micro$oft are you?
movieprodw:
Hello,I have an Arduino in a field and am going to be making a couple more.
I would like a way to update the code on them remotely.
How can I do that?
Matt
Will you have wifi in the field?
.
I am sorry, I am using a Mega 2560 and a SIM 7000A