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Temperature Measurement & MODBUS Integration #17

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rahix merged 13 commits from more-temps into main 2024-11-10 06:58:09 +00:00
Conversation 1 Commits 13 Files changed 7 +24 -21
1 changed files with 24 additions and 21 deletions
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45
succbone/succd/modbus.go
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@ -40,28 +40,27 @@ func (d *daemon) modbusConnect() error {
// The first one (slave 1) is a temperature/humidity sensor. // The first one (slave 1) is a temperature/humidity sensor.
// The second one (slave 2) is a PTA8D08 transmitter // The second one (slave 2) is a PTA8D08 transmitter
func (d *daemon) modbusUpdate() error { func (d *daemon) modbusUpdate() error {
d.mu.Lock()
defer d.mu.Unlock()
var err error var err error
var registers []uint16 // temperature, humidity
// Switch to slave 1 // Switch to slave 1 (BTA1)
d.modbusClient.SetUnitId(1) d.modbusClient.SetUnitId(1)
// Read temperature and humidity // Read temperature and humidity
registers, err = d.modbusClient.ReadRegisters(1, 2, modbus.INPUT_REGISTER) var registersBTA1 []uint16 // temperature, humidity
registersBTA1, err = d.modbusClient.ReadRegisters(1, 2, modbus.INPUT_REGISTER)
if err != nil { if err != nil {
return err return err
} }
if len(registers) != 2 { if len(registersBTA1) != 2 {
msg := fmt.Sprintf("Expected two registers from modbus slave 1, but got %d", len(registers)) msg := fmt.Sprintf("Expected two registers from modbus slave 1, but got %d", len(registersBTA1))
return errors.New(msg) return errors.New(msg)
} }
d.daemonState.tempSEM = modbusValuesToFloat(registers[0]) d.mu.Lock()
d.daemonState.humiditySEM = modbusValuesToFloat(registers[1]) d.daemonState.tempSEM = modbusValuesToFloat(registersBTA1[0])
d.daemonState.humiditySEM = modbusValuesToFloat(registersBTA1[1])
d.mu.Unlock()
// Switch to slave 2 (KEC2) // Switch to slave 2 (KEC2)
d.modbusClient.SetUnitId(2) d.modbusClient.SetUnitId(2)
@ -70,18 +69,21 @@ func (d *daemon) modbusUpdate() error {
// Channel 0: Cable -WGA6, Sensor "dp bottom" // Channel 0: Cable -WGA6, Sensor "dp bottom"
// Channel 1: Cable -WGA8, Sensor "dp inlet" // Channel 1: Cable -WGA8, Sensor "dp inlet"
// Channel 2: Cable WGA7, Sensor "dp top" // Channel 2: Cable WGA7, Sensor "dp top"
registers, err = d.modbusClient.ReadRegisters(0, 3, modbus.HOLDING_REGISTER) var registersKEC2 []uint16 // temperatures dp
registersKEC2, err = d.modbusClient.ReadRegisters(0, 3, modbus.HOLDING_REGISTER)
if err != nil { if err != nil {
return err return err
} }
if len(registers) != 3 { if len(registersKEC2) != 3 {
return fmt.Errorf("expected three registers from modbus slave 2, but got %d", len(registers)) return fmt.Errorf("expected three registers from modbus slave 2, but got %d", len(registersKEC2))
} }
d.daemonState.tempDPBottom = modbusValuesToFloat(registers[0]) d.mu.Lock()
d.daemonState.tempDPInlet = modbusValuesToFloat(registers[1]) d.daemonState.tempDPBottom = modbusValuesToFloat(registersKEC2[0])
d.daemonState.tempDPTop = modbusValuesToFloat(registers[2]) d.daemonState.tempDPInlet = modbusValuesToFloat(registersKEC2[1])
d.daemonState.tempDPTop = modbusValuesToFloat(registersKEC2[2])
d.mu.Unlock()
// Switch to slave 3 (KEC1) // Switch to slave 3 (KEC1)
d.modbusClient.SetUnitId(3) d.modbusClient.SetUnitId(3)
@ -106,7 +108,7 @@ func (d *daemon) modbusUpdate() error {
// KFA1-KFA8 // KFA1-KFA8
var relayState [8]bool var relayState [8]bool
d.mu.Lock()
// -KFA1 Roughing Pump (normally closed contact) // -KFA1 Roughing Pump (normally closed contact)
relayState[0] = !d.daemonState.rpOn relayState[0] = !d.daemonState.rpOn
// -KFA2 Diffusion Pump // -KFA2 Diffusion Pump
@ -119,23 +121,24 @@ func (d *daemon) modbusUpdate() error {
relayState[5] = !d.aboveRough.output relayState[5] = !d.aboveRough.output
// -KFA7 Fake-Pirani High (normally closed contact) // -KFA7 Fake-Pirani High (normally closed contact)
relayState[6] = !d.aboveHigh.output relayState[6] = !d.aboveHigh.output
d.mu.Unlock()
// The KEC1 module uses a non-standard MODBUS interface // The KEC1 module uses a non-standard MODBUS interface
// instead of coils // instead of coils
// 0x0100 is the open command // 0x0100 is the open command
// 0x0200 is the close command // 0x0200 is the close command
// We write 8 words (16-bit) to address 0x01 to update the relays // We write 8 words (16-bit) to address 0x01 to update the relays
var registerValues [8]uint16 var registerValuesKEC1 [8]uint16
// Convert the boolean values to the commands // Convert the boolean values to the commands
for idx, state := range relayState { for idx, state := range relayState {
if state { if state {
registerValues[idx] = 0x0100 registerValuesKEC1[idx] = 0x0100
} else { } else {
registerValues[idx] = 0x0200 registerValuesKEC1[idx] = 0x0200
} }
} }
err = d.modbusClient.WriteRegisters(0x01, registerValues[:]) err = d.modbusClient.WriteRegisters(0x01, registerValuesKEC1[:])
if err != nil { if err != nil {
return err return err
} }