# How to send an API packet from coordinator to end device

**URL:** <https://forums.digi.com/t/how-to-send-an-api-packet-from-coordinator-to-end-device/12642>\
**Category:** XBee - 802.15.4\
**Tags:** xbee-coordinator, api-packet, transmit-data\
**Created:** [March 10, 2014, 1:50am UTC](https://forums.digi.com/t/how-to-send-an-api-packet-from-coordinator-to-end-device/12642 "2014-03-10T01:50:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mheee09](https://avatars.discourse-cdn.com/v4/letter/m/b5a626/32.png) [@mheee09](https://forums.digi.com/u/mheee09)\
**Post date:** [March 10, 2014, 1:50am UTC](https://forums.digi.com/t/how-to-send-an-api-packet-from-coordinator-to-end-device/12642/1 "2014-03-10T01:50:22Z")

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My one xbee s2 is in coordinator api 1 mode.this is connected to pc though serial port.  
Another xbee s2 is in end device mode and collecting data from ad0 pin.  
In xctu terminal of coordinator it receives continuous packet from end device.  
now i want to send a packet from coordinator to end device and this will be sent to a micro controller. please help me.  
how can i send this packet to end device?

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [April 30, 2014, 3:08pm UTC](https://forums.digi.com/t/how-to-send-an-api-packet-from-coordinator-to-end-device/12642/2 "2014-04-30T15:08:10Z")

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You need to assemble and issue to the radio at the PC a TX request API packet in Hex values. If you are not familiar with this, I would suggest reading over the XBee ZB product manual and use the XCTUNG software.