# Amount of zigbee devices (Is it different between 2023 and 2019?) **URL:** \ **Category:** Devices\ **Tags:** zigbee\ **Created:** [September 3, 2023, 9:07am UTC](https://community.homey.app/t/amount-of-zigbee-devices-is-it-different-between-2023-and-2019/88662 "2023-09-03T09:07:17Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Peter\_Kawa](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peter_kawa/32/173848_2.png) [@Peter\_Kawa](https://community.homey.app/u/Peter_Kawa)\ **Post date:** [September 3, 2023, 1:29pm UTC](https://community.homey.app/t/amount-of-zigbee-devices-is-it-different-between-2023-and-2019/88662/2 "2023-09-03T13:29:55Z")
Some users reported using 70 zigbee devices on Pro 2019, but that’s quite extreme. Pro 2023 should be able to work with 200+ zigbee devices. When zigbee is starting to fail sometimes, it’s not Homey dying. It’s possible your power supply unit is dying. Replace it (and it’s cable) by a well-known brand version with 5V and 2 Amperes minimum When that doesn’t help: Check your wifi - zigbee interference → do you have nearby neigbours with new wifi radios? Is your 2.4GHz wifi channel set to fixed? Is your zigbee channel not too close to a wifi channel? > ![Screenshot_20210413-165254_Chrome~01](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/2/9/29f6698638a638a6c12d8e2167f46b2960c6e466.jpeg) When all’s fine, you can do this: Start Homey in recovery mode, and start “Full software download”. It doesn’t affect your settings and all, but I’d recommend having a recent backup available. > [@\[HowTo\]\[Pro\] Restarting Homey Pro to Recovery Mode - Adv. Options From Mobile](https://community.homey.app/t/howto-pro-restarting-homey-pro-to-recovery-mode-adv-options-from-mobile/61222): > > This option is only for Homey (Pro) models “Early 2016”, “Early 2018” and “Early 2019” so Only the White Ball’s Sometimes you need the extra options, things hidden for normal use, for example: Full Firmware download Complete Reset to sell your old Homey Or maybe you just want to change Homey’s WiFi. There are now a couple of extra options in the mobile Apps, so no need to use an FireFox or Chome Browser with flags enabled to press the Alt- key on your keyboard. Just use your App from no… --- _[View the full topic](https://community.homey.app/t/amount-of-zigbee-devices-is-it-different-between-2023-and-2019/88662)._