Using Python CLI v1.3.29:
```
>meshtastic --set lora.modem_preset longSlow
Connected to radio
lora.modem_preset does not have an enum called longSlow, so you can not set it.
Choices in sorted order are:
LongFast
LongSlow
MedFast
MedSlow
ShortFast
ShortSlow
VLongSlow
LocalConfig and LocalModuleConfig do not have attribute lora.modem_preset.
```