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> But modern modems aren't connected over serial. There's no concept of line speed. This property is entirely irrelevant to modern hardware. Says who? I'm just
by yetihehe 3y ago
> But modern modems aren't connected over serial. There's no concept of line speed. This property is entirely irrelevant to modern hardware.
Says who? I'm just commenting here and on second screen I'm debugging a microcontroller connected over serial link to a LTE cat M1 modem, that's a pretty modern one. It uses 115200 8n1 line by default, but you can change that speed, it even has speed autodetection, after modem signals that it's ready on separate line, you can send it "AT" at your preferred speed until it responds (typically after third AT).
- mjg59 3y agoMy apologies, you're right (and I say this as someone who has REed devices with an LTE modem connected over serial, so I really should have known better). But I would certainly still assert that the choice of the AT prefix was for compatibility rather than for line speed detection.