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33 lines
834 B
Go
33 lines
834 B
Go
3 years ago
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package sds
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import (
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"fmt"
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"github.com/ftl/tetra-pei/tetra"
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)
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type Encoder interface {
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Encode([]byte, int) ([]byte, int)
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}
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type EncoderFunc func() ([]byte, int)
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func (f EncoderFunc) Encode() ([]byte, int) {
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return f()
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}
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const (
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// SwitchToSDSTL is a short-cut for selecting the SDS-TL AI service according to [PEI] 6.14.6
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SwitchToSDSTL = "AT+CTSDS=12,0,0,0,1"
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// SwitchToStatus is a short-cut for selecting the status AI service according to [PEI] 6.14.6
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SwitchToStatus = "AT+CTSDS=13,0"
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)
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// SendMessage according to [PEI] 6.13.2
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func SendMessage(destination tetra.Identity, sds Encoder) string {
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pdu := make([]byte, 0, 2000) // TODO use the maximum size allowed
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pduBits := 0
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pdu, pduBits = sds.Encode(pdu, pduBits)
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return fmt.Sprintf("AT+CMGS=%s,%d\x0d\x0a%s\x1a", destination, pduBits, tetra.BinaryToHex(pdu))
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}
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