diff --git a/wifinina/wifinina.go b/wifinina/wifinina.go
index a984ff3..81ca223 100644
--- a/wifinina/wifinina.go
+++ b/wifinina/wifinina.go
@@ -17,7 +17,7 @@ import (
 	"tinygo.org/x/drivers/net"
 )
 
-const _debug = false
+const _debug = true
 
 const (
 	MaxSockets  = 4
@@ -319,6 +319,8 @@ func (d *Device) StartClient(addr uint32, port uint16, sock uint8, mode uint8) e
 	l += d.sendParam8(mode, true)
 	d.addPadding(l)
 	d.spiChipDeselect()
+
+	println("wait for rsp cmd")
 	_, err := d.waitRspCmd1(CmdStartClientTCP)
 	return err
 }
@@ -579,7 +581,24 @@ func (d *Device) SetPassphrase(ssid string, passphrase string) error {
 }
 
 func (d *Device) SetKey(ssid string, index uint8, key string) error {
-	return ErrNotImplemented
+	defer d.spiChipDeselect()
+	if err := d.waitForChipSelect(); err != nil {
+		return err
+	}
+
+	d.sendCmd(CmdSetKey, 3)
+	d.sendParamStr(ssid, false)
+	d.sendParam8(index, false)
+	d.sendParamStr(key, true)
+
+	d.padTo4(8 + len(ssid) + len(key))
+
+	_, err := d.waitRspCmd1(CmdSetKey)
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
 func (d *Device) SetNetworkForAP(ssid string) error {
@@ -597,11 +616,41 @@ func (d *Device) SetIP(which uint8, ip uint32, gw uint32, subnet uint32) error {
 }
 
 func (d *Device) SetDNS(which uint8, dns1 uint32, dns2 uint32) error {
-	return ErrNotImplemented
+	defer d.spiChipDeselect()
+	if err := d.waitForChipSelect(); err != nil {
+		return err
+	}
+
+	d.sendCmd(CmdSetDNSConfig, 3)
+	d.sendParam8(which, false)
+	d.sendParam32(dns1, false)
+	d.sendParam32(dns2, true)
+
+	_, err := d.waitRspCmd1(CmdSetDNSConfig)
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
 func (d *Device) SetHostname(hostname string) error {
-	return ErrNotImplemented
+	defer d.spiChipDeselect()
+	if err := d.waitForChipSelect(); err != nil {
+		return err
+	}
+
+	d.sendCmd(CmdSetHostname, 3)
+	d.sendParamStr(hostname, true)
+
+	d.padTo4(5 + len(hostname))
+
+	_, err := d.waitRspCmd1(CmdSetHostname)
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
 func (d *Device) SetPowerMode(mode uint8) error {
@@ -768,7 +817,7 @@ func (d *Device) sendCmdStr(cmd uint8, p1 string) (err error) {
 		return err
 	}
 	l := d.sendCmd(cmd, 1)
-	l += d.sendParamStr(p1, false)
+	l += d.sendParamStr(p1, true)
 	d.addPadding(l)
 	return nil
 }
@@ -778,10 +827,10 @@ func (d *Device) sendCmdStr2(cmd uint8, p1 string, p2 string) (err error) {
 	if err := d.waitForChipSelect(); err != nil {
 		return err
 	}
-	l := d.sendCmd(cmd, 2)
-	l += d.sendParamStr(p1, false)
-	l += d.sendParamStr(p2, true)
-	d.addPadding(l)
+	d.sendCmd(cmd, 2)
+	d.sendParamStr(p1, false)
+	d.sendParamStr(p2, true)
+	d.padTo4(6 + len(p1) + len(p2))
 	return nil
 }
 
@@ -1092,3 +1141,14 @@ func (d *Device) addPadding(l int) {
 		d.SPI.Transfer(dummyData)
 	}
 }
+
+func (d *Device) padTo4(l int) {
+	if _debug {
+		println("addPadding", l, "\r")
+	}
+
+	for l%4 != 0 {
+		d.SPI.Transfer(dummyData)
+		l++
+	}
+}