Printer and non-transitory computer-readable recording medium storing computer-readable instructions for printer

A non-transitory computer-readable recording medium storing computer-readable instructions for a printer, wherein the computer-readable instructions, when executed by a processor of the printer, cause the printer to:

• accept a wireless setting instruction;
• after the wireless setting instruction has been accepted, cause a print executing unit of the printer to start printing of a code image on a print medium, the code image being obtained by coding a public key,
• wherein in a case where the code image printed on the print medium is image-captured by a first external device, the public key is obtained by the first external device;
• control an operation state of the printer,
• wherein after the wireless setting instruction has been accepted, the operation state of the printer is controlled to be a respondent state, the respondent state being a state in which an authentication response is sent to the first external device in response to receiving an authentication request from the first external device, and
• in a case where a specific condition is satisfied in a situation where the operation state of the printer is the respondent state after the wireless setting instruction has been accepted, the operation state of the printer is controlled to be a non-respondent state, the non-respondent state being a state in which the authentication response is not sent;
• receive the authentication request from the first external device via a wireless interface of the printer;
• in a case where the authentication request is received from the first external device in a situation where the operation state of the printer is the respondent state, send the authentication response to the first external device via the wireless interface;
• after the authentication response has been sent to the first external device, receive connection information from the first external device via the wireless interface, the connection information being for establishing a wireless connection between the printer and a second external device via the wireless interface;
• and
• in a case where the connection information is received from the first external device, establish, by using the connection information, the wireless connection between the printer and the second external device via the wireless interface.