# I have six end device xbee radios but can only connect to a maximum of four at once.

**URL:** <https://forums.digi.com/t/i-have-six-end-device-xbee-radios-but-can-only-connect-to-a-maximum-of-four-at-once/20348>\
**Category:** XBee - 802.15.4\
**Tags:** s2c, 802-15-4, maximum-number, xbee\
**Created:** [March 14, 2019, 3:24pm UTC](https://forums.digi.com/t/i-have-six-end-device-xbee-radios-but-can-only-connect-to-a-maximum-of-four-at-once/20348 "2019-03-14T15:24:59Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tectp](https://avatars.discourse-cdn.com/v4/letter/t/4491bb/32.png) [@tectp](https://forums.digi.com/u/tectp)\
**Post date:** [March 14, 2019, 3:24pm UTC](https://forums.digi.com/t/i-have-six-end-device-xbee-radios-but-can-only-connect-to-a-maximum-of-four-at-once/20348/1 "2019-03-14T15:24:59Z")

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I can connect successfully to all six devices individually and to a maximum of four at once, but when five or more are powered up, none of the devices respond to messages. When I power two of them off the devices begin to respond again.  
Is it only possible to have four end devices working at once under this firmware? I am using api mode with escaped characters on coordinator and end devices.  
Coordinator DH is 0, DL is FFFF, MY is 0  
The six end devices have their MY addresses set as 2222, 3333, 4444, 5555, 6666, 7777.

Thank you, Nick