diff --git a/i2csoft/i2csoft.go b/i2csoft/i2csoft.go
index db35043..d219bc2 100644
--- a/i2csoft/i2csoft.go
+++ b/i2csoft/i2csoft.go
@@ -3,6 +3,9 @@ package i2csoft
 import (
 	"errors"
 	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/delay"
 )
 
 // I2C is an I2C implementation by Software. Since it is implemented by
@@ -278,3 +281,8 @@ func (i2c *I2C) WriteRegister(address uint8, register uint8, data []byte) error
 func (i2c *I2C) ReadRegister(address uint8, register uint8, data []byte) error {
 	return i2c.Tx(uint16(address), []byte{register}, data)
 }
+
+// wait waits for half the time of the SCL operation interval.
+func (i2c *I2C) wait() {
+	delay.Sleep(50 * time.Microsecond) // half of a 100kHz cycle (50µs)
+}
diff --git a/i2csoft/i2csoft_atsamd51.go b/i2csoft/i2csoft_atsamd51.go
deleted file mode 100644
index e4a2390..0000000
--- a/i2csoft/i2csoft_atsamd51.go
+++ /dev/null
@@ -1,16 +0,0 @@
-//go:build atsamd51 || atsame5x
-
-package i2csoft
-
-import (
-	"device"
-)
-
-// wait waits for half the time of the SCL operation interval. It is set to
-// about 100 kHz.
-func (i2c *I2C) wait() {
-	wait := 20
-	for i := 0; i < wait; i++ {
-		device.Asm(`nop`)
-	}
-}
diff --git a/i2csoft/i2csoft_esp32.go b/i2csoft/i2csoft_esp32.go
deleted file mode 100644
index dc33207..0000000
--- a/i2csoft/i2csoft_esp32.go
+++ /dev/null
@@ -1,16 +0,0 @@
-//go:build esp32
-
-package i2csoft
-
-import (
-	"device"
-)
-
-// wait waits for half the time of the SCL operation interval. It is set to
-// about 100 kHz.
-func (i2c *I2C) wait() {
-	wait := 60
-	for i := 0; i < wait; i++ {
-		device.Asm(`nop`)
-	}
-}
diff --git a/i2csoft/i2csoft_nrf52840.go b/i2csoft/i2csoft_nrf52840.go
deleted file mode 100644
index b206ace..0000000
--- a/i2csoft/i2csoft_nrf52840.go
+++ /dev/null
@@ -1,16 +0,0 @@
-//go:build nrf52840
-
-package i2csoft
-
-import (
-	"device"
-)
-
-// wait waits for half the time of the SCL operation interval. It is set to
-// about 100 kHz.
-func (i2c *I2C) wait() {
-	wait := 26
-	for i := 0; i < wait; i++ {
-		device.Asm(`nop`)
-	}
-}
diff --git a/i2csoft/i2csoft_other.go b/i2csoft/i2csoft_other.go
deleted file mode 100644
index 6a71099..0000000
--- a/i2csoft/i2csoft_other.go
+++ /dev/null
@@ -1,15 +0,0 @@
-//go:build !esp32 && !atsamd51 && !atsame5x && !stm32f4 && !rp2040 && !nrf52840
-
-package i2csoft
-
-import (
-	"device"
-)
-
-// wait waits for half the time of the SCL operation interval.
-func (i2c *I2C) wait() {
-	wait := 20
-	for i := 0; i < wait; i++ {
-		device.Asm(`nop`)
-	}
-}
diff --git a/i2csoft/i2csoft_rp2040.go b/i2csoft/i2csoft_rp2040.go
deleted file mode 100644
index a28144a..0000000
--- a/i2csoft/i2csoft_rp2040.go
+++ /dev/null
@@ -1,16 +0,0 @@
-//go:build rp2040
-
-package i2csoft
-
-import (
-	"device"
-)
-
-// wait waits for half the time of the SCL operation interval. It is set to
-// about 100 kHz.
-func (i2c *I2C) wait() {
-	wait := 50
-	for i := 0; i < wait; i++ {
-		device.Asm(`nop`)
-	}
-}
diff --git a/i2csoft/i2csoft_stm32f4.go b/i2csoft/i2csoft_stm32f4.go
deleted file mode 100644
index ab19c7c..0000000
--- a/i2csoft/i2csoft_stm32f4.go
+++ /dev/null
@@ -1,16 +0,0 @@
-//go:build stm32f4
-
-package i2csoft
-
-import (
-	"device"
-)
-
-// wait waits for half the time of the SCL operation interval. It is set to
-// about 100 kHz.
-func (i2c *I2C) wait() {
-	wait := 77
-	for i := 0; i < wait; i++ {
-		device.Asm(`nop`)
-	}
-}