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I need help figuring out why the red light is flashing on our little card reader

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From a quick google search a flashing red light for a square reader is :
If you see a blinking red light, that means your Square Reader battery is low and should be charged immediately. If your Square Reader is in a dock, plug the dock's power cord into a power outlet.
I have not had this problem as my reader is in a Dock that is always plugged in.
Owner
Pocono Candle
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Square Support Number 855-700-6000.
Make Sure App and OS is up to date on your Device.
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To add to what @Candlestore memtioned:
What do the lights mean?
The four LED lights displayed on your reader will tell you all you need to know
about your reader.
Connecting your reader:
Four orange lights flashing --- Reader is in pairing mode
Four green lights ------------- Reader has successfully paired
Four red lights --------------- Reader failed to pair
While accepting a payment:
One green light ------- Reader is ready to take a payment
Moving green lights --- Reader is processing a payment
Four green lights ----- Payment was accepted
Four red lights ------- Payment was declined
Note: If you don’t see one green light to initiate a payment after 30 seconds,
please tap “Re-enable Apple Pay and Contactless” in the app.
Checking your battery:
Four green lights ------ Battery is fully charged
Three green lights ----- Battery is 75% charged
Two green lights ------- Battery 50% charged
One solid red light ---- Battery 25% charged
One blinking red light - Battery is low and charge immediately
If your reader is completely out of battery, you will see two scrolling red lights
when you reconnect your reader to power and it initiates charging.
------------------------------------------------------------------------------------
Force shutdown your reader (hard reset):
* Plug in the reader for at least 20 minutes to be sure it’s charged.
* While the reader is charging, use a bobby pin, pen cap, or paper clip to firmly
press and hold the button on the reader for 20 seconds.
* After 20 seconds, release the button and wait 10 seconds.
* Press the button again to turn the reader on and observe any lights on the reader.
Hope that answers or helps with any future concerns.

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From a quick google search a flashing red light for a square reader is :
If you see a blinking red light, that means your Square Reader battery is low and should be charged immediately. If your Square Reader is in a dock, plug the dock's power cord into a power outlet.
I have not had this problem as my reader is in a Dock that is always plugged in.
Owner
Pocono Candle
Mark as Best Answer if this Helped you solve an issue or give it a thumbs up if you like the answer.
Square Support Number 855-700-6000.
Make Sure App and OS is up to date on your Device.
- Subscribe to RSS Feed
- Mark Thread as New
- Mark Thread as Read
- Float this Thread for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
To add to what @Candlestore memtioned:
What do the lights mean?
The four LED lights displayed on your reader will tell you all you need to know
about your reader.
Connecting your reader:
Four orange lights flashing --- Reader is in pairing mode
Four green lights ------------- Reader has successfully paired
Four red lights --------------- Reader failed to pair
While accepting a payment:
One green light ------- Reader is ready to take a payment
Moving green lights --- Reader is processing a payment
Four green lights ----- Payment was accepted
Four red lights ------- Payment was declined
Note: If you don’t see one green light to initiate a payment after 30 seconds,
please tap “Re-enable Apple Pay and Contactless” in the app.
Checking your battery:
Four green lights ------ Battery is fully charged
Three green lights ----- Battery is 75% charged
Two green lights ------- Battery 50% charged
One solid red light ---- Battery 25% charged
One blinking red light - Battery is low and charge immediately
If your reader is completely out of battery, you will see two scrolling red lights
when you reconnect your reader to power and it initiates charging.
------------------------------------------------------------------------------------
Force shutdown your reader (hard reset):
* Plug in the reader for at least 20 minutes to be sure it’s charged.
* While the reader is charging, use a bobby pin, pen cap, or paper clip to firmly
press and hold the button on the reader for 20 seconds.
* After 20 seconds, release the button and wait 10 seconds.
* Press the button again to turn the reader on and observe any lights on the reader.
Hope that answers or helps with any future concerns.