How can I send an emoji to chatsecure client from linux cli?

[Pavel077]

Hello.

I'm sending messages from Zabbix via command-line utility to Chatsecure client on iPhone. The messages are getting delivered, but since this is a monitoring app, I'd like to add a "warning sign" emoji (https://www.unicode.org/emoji/charts/full-emoji-list.html#26a0) and a "check sign" (https://www.unicode.org/emoji/charts/full-emoji-list.html#2705)

What text should i send so that Chatsecure would display this emoji? I've tried a lot of variants based on https://codepoints.net/U+2705, but all I was able to achieve was correct display of emoji at push notification preview - this happens when I send html codes ✅ and ⚠ but when I open chat in client it displays literally ⚠, not emoji.

Thank you.